Filing your tax return no longer requires sitting in front of a computer. Today you can Process all your tax returns from your smartphoneFrom reviewing your tax data to signing and submitting the declaration, either with the official Tax Agency app or by accessing Renta WEB from your mobile phone.
However, just because it's convenient doesn't mean you can do it carelessly: the Tax Agency provides you with the draft, but The responsibility for reviewing and correcting the data is entirely yours.If there are errors and you don't correct them, you may face penalties, so it's a good idea to understand how the whole process works on your mobile device before hitting the submit button.
Basic requirements for filing your tax return from your mobile phone
Before you get started, it's important to be clear about the minimum requirements to be able to Access your tax return file from your smartphone smoothly.
What do you need in terms of technical specifications?
To use the Tax Agency app or Renta WEB in your mobile browser you need a relatively updated device and a stable internet connection. In practice, all you need is the ability to Install the AEAT app on Android (Google Play) or iOS (App Store) and that your browser is compatible with the certificates and identification systems used by the Tax Agency.
Digital identification: Cl@ve, certificate, electronic ID card, reference or eIDAS
The Spanish Tax Agency offers several identification methods to access the online tax return portal (Renta WEB) and the app, all of which are compatible with mobile devices. You'll typically combine several methods depending on the situation, but broadly speaking, these are the options:
- Cl@ve Mobile: identification system based on the DNI/NIE and a verification data (validity date, issue or support number), with confirmation in the Cl@ve app or by PIN received by SMS.
- Electronic certificate or DNIe: if you have the FNMT certificate or your Electronic ID card with your mobile phone installed or available on your mobile (or linked to the browser you use), you can identify yourself securely and completely.
- Income Reference NumberA 6-character key obtained from box 505 of your previous year's tax return or by logging in with a digital certificate, electronic ID card (DNIe), or Cl@ve PIN. It is used to manage all campaign services (tax data, draft return, filing, etc.).
- Identification as an EU Citizen (eIDAS)If you are a resident in another EU country, you can use your country's electronic identification mechanisms to access AEAT services through the eIDAS system.
Furthermore, if you don't want to do it yourself from your mobile phone, you always have the alternative of the telephone service. “We called him”For this, you will need to schedule an appointment through the AEAT website, the app, or by calling their official phone numbers. In that case, an agency representative will help you prepare and submit your tax return over the phone.
AEAT app: how to file your tax return from your smartphone
The official app of the Tax Agency is the most direct way if you want File your tax return with just a couple of tapsprovided that the AEAT has all the necessary data to prepare your Income Tax return without additional changes.
Install and access the Tax Agency app
The first thing to do is download the app to your mobile phone. “AEAT” app from Google Play (Android) or App Store (iOS)Once installed, open it and proceed to log in. Within the app, you can use different access methods:
- Digital certificate or electronic ID card (DNIe), if your mobile phone or browser supports it.
- Cl@ve Móvil system, using your document and verification data, confirming in the Cl@ve app or with PIN via SMS.
- Simple identification with ID card and expiry date (and additional security steps, as indicated by the app itself).
After successfully logging in, you will see the main menu, where a specific section appears for “Income” and within that the option “Income 2025” (corresponding to the campaign presented in 2026, since it covers the previous fiscal year).
Enter the 2025 Income Tax section within the app
On the app's main screen, tap the block of “Income Tax” and select “Income Tax 2025”You will access a menu with various campaign-related procedures, such as processing the draft, consulting data, or submitting the declaration.
To view your draft and proceed with the declaration, go to the option “Processing of draft / declaration”If you have already worked on your draft in Renta WEB, the option will also appear. “Continue with the presentation” to resume the saved session.
App limitations: why it's better to check your tax return online
The AEAT app is designed primarily for Check the result and quickly submit the declarationFrom your mobile device, the application allows you to view a summary of the draft (to pay, to be refunded or zero fee), individually, for your spouse and for the joint declaration, if applicable.
However, the app It does not allow full editing of the draft.Any relevant content changes (new income, complex deductions, properties, etc.) must be made through the official website, either from your computer or your mobile browser by accessing Renta WEB. You can then return to the app to submit your return.
Keep in mind that, although the Tax Office automatically collects much of your data (payroll, mortgage, interest, etc.), There may be missing or incorrect informationAnd you remain responsible for reviewing everything. You also have a deadline for amending a previously submitted return, but it's best to get it right from the start to avoid problems.
Confirmation of tax domicile from the app
If you have not yet confirmed your tax address for the year, when you try to file your tax return through the app you will be asked to confirms your current usual addressYou will see your identification details and the address registered with the Spanish Tax Agency (AEAT).
On this screen you can:
- Pulsar "Ratify" if the data is correct.
- Pulsar "Modify" if the address or ownership of the property has changed.
When you indicate the property ownership, the previous year's ownership will be loaded by default. If you select the key "Tenant"You will need to provide the landlord's tax identification number (NIF). Once the habitual address is confirmed, the app generates a receipt and you can then tap on "Continue" to continue with the process.
If you have a spouse and/or children, the app will also offer the possibility of ratify or modify the tax domicile of each one (if you haven't already), to keep the entire family unit updated.
Statements available at the working session
Once the identification and address phase is completed, the application will display the statements available in your session: your individual return, your spouse's return and those of your children who must file a return, as well as the option of a joint return if applicable.
If you had already started working at Renta WEB, you will be able to Continue with the saved work sessionIf there is no previous session, the app will request the calculation of your tax returns using the information available to the Spanish Tax Agency (AEAT). If you have a spouse, they must also be identified in the application; otherwise, you will be offered the option to identify them at that time or calculate only your individual return.
In some cases, your current marital status may not be reflected in your tax records. In that case, you will need to select the appropriate option (single, widowed, separated or divorced). If you are married or wish to add descendants or ascendants to the family unit, you will need to continue the process in Website rentalwhere the form is more complete.
Statement summary and PDF preview
The app has a “Summary of statements” where you can clearly see the result for each filing option: individual (taxpayer), spouse, and joint. It also indicates whether it's the most advantageous option and whether or not you are required to file a return.
Next to each statement you will see:
- The modality (individual or joint) and its more or less favorable character.
- The ID/NIE of each member of the family unit included.
- Access to tax information of each member that has an individual declaration.
- A button "Preview" which generates a PDF to review the declaration in detail (marked as "Draft not valid for submission").
The economic result is displayed with a very visual color code: green if it's to be returned, red if it is to enter and black for zero result.
If the app detects that data is missing or that you need provide additional informationThis will require you to continue the process on the Renta WEB website before you can submit your application. For certain groups, such as members of mutual insurance societies who have not yet submitted their application for a refund of income tax withheld on contributions to such societies (according to current regulations), a specific notification may appear prompting you to submit the corresponding form at that time.
Notices of non-obligation and special messages
It may happen that, according to the data handled by the Tax Agency, you are not required to file a tax returnIn that case, in the "Notices" section of the app you will see a message such as: "According to the information we have, you are not required to file your Income Tax return."
Even so, you can choose to file voluntarily if you're interested, for example, to claim deductions or request a refund. The app will continue to guide you through the filing process just like it would any other taxpayer.
Setting up the payment method from the app
Before submitting your tax return, the application will show you a summary with your personal information, the financial result, and your configured payment or collection method. Here you will be able to add or modify the IBAN and manage the tax allocation (Catholic Church and Social Purposes).
In return declarations, the following will appear by default: IBAN that you used in the previous exerciseYou can change it by clicking on "Change" to choose between "To a Spanish account" or "To a foreign EU/SEPA account", or directly enter a new IBAN if none is indicated.
In declarations to be entered, the options change depending on the time of the campaign and what is shown in the app:
- During the direct debit period (until June 25), the app will display the following by default: payment in two installments with both payments by direct debit.
- Once the direct debit period has ended, the default option becomes the single payment, not in installments.
If you want to change the payment method, go to the section “Payment method” and press “Change”You can indicate whether you wish to split the payment or not, and depending on your choice, different possible combinations will be displayed (direct debit of one or two installments, electronic payment, prior NRC, etc.). When finished, click on "Save Changes" so that the configuration is saved.
Payment and installment options available in the app
When the result is to enter, a fairly wide range of payment methods are offered, which in the app are mainly grouped into:
- Payment in two installmentswith these possible combinations:
- Direct debit of both installments from a bank account.
- First installment with electronic payment (card or Bizum) or recovering a previous payment via NRC, and second installment by direct debit.
- First installment with payment at Bank/Cash House (by document) and second installment by direct debit.
- Payment in full (one installment)with these options:
- Direct debit of the total amount from a single account (Spanish or EU/SEPA).
- Electronic payment by card or Bizum, or recovery of a previous payment by entering the NRC of the receipt.
- Payment slip to make the payment at the Bank or Savings Bank, leaving the declaration pending payment.
The field of "Bank account" By default, the system will display the previous year's IBAN, if available. You can change it by clicking "Change" and choosing between a Spanish account or an EU/SEPA foreign account, then entering the new IBAN. Account number validations are performed when you click "Save Changes."
In parallel, the app allows you check or uncheck the tax allocation boxes to the Catholic Church and other social purposes. Simply move each button to "Yes" or "No" as you prefer and save the changes.
Final presentation from the app and supporting documentation
Before the final presentation, you can review all the data one more time by clicking on the PDF preview (with a watermark indicating it is not suitable for submission). From this window, you also have direct access to your tax information should you wish to check any specific details.
When you're sure everything is correct, tap on “File a declaration”The app will ask for additional confirmation (“Yes, submit”) and will show you basic information about the processing of your personal data. Once accepted, the system processes the submission.
If the presentation is successful, a message will appear. “The presentation was a success.” along with a Secure Verification Code (CSV). This CSV allows you to retrieve the official copy of your declaration from the "Document verification using secure verification code (CSV)" section of the electronic office.
Additionally, you will be able to click on “See submitted statement” To generate the complete PDF, you can view it on screen or save it to your device as proof of payment. If you paid via bank transfer, you will see a reminder to go to a financial institution to make the payment on time. If the tax return was filed by several members of the family unit, a notification may also appear indicating that some returns from other members are still pending.
Access Renta WEB from your mobile phone with Cl@ve Móvil
If you need to make significant changes to the draft, it is highly recommended to use Rent WEB from your smartphone browserCl@ve Móvil is one of the most convenient methods to log in, especially if you already have the Cl@ve app installed.
Access Renta WEB with Cl@ve Móvil
From your mobile browser, go to the Tax Agency website and go to the “Outstanding Management” by RentaThere you will find the link “Draft/Return Processing Service (Direct Income Tax and Web Income Tax)”. Within it, select the option “Cl@ve Móvil” to start the authentication process.
You will be offered three ways to identify yourself with Cl@ve:
- Scan a QR code with the Cl@ve app installed on another device.
- Continue without scanning the QR code, by entering your ID/NIE and the verification data (validity date, issue date if the ID is permanent 01-01-9999 or support number if it is an NIE).
- Access with Cl@ve Móvil via SMS, receiving a 6-digit PIN after pressing the PIN button via SMS once it is enabled (after a few seconds).
In all cases, you will see an authentication request on the screen with a verification code and expiration timeOpen the Cl@ve app, verify that the information matches, and tap "Confirm" (and, if requested, a second confirmation). If you choose the SMS PIN, enter the code received in the corresponding field and tap "Access".
After identifying yourself, you must indicate whether you are acting in my own name or as a representativeOnce inside your file, go to “Draft/Declaration Processing Service (Direct Income and WEB Income)” within the “Available Services” section.
Continue a previous session or start a new statement
If you have previously accessed Renta WEB, a pop-up window will open indicating that there is a saved statementYou can choose between “Continue session” to pick up where you left off, or “New declaration” to start from scratch incorporating the available tax data.
From that same screen you will also be able to choose the language in which you want to work. And if you have already filed the return for that year, the system will detect the existence of a filed return and add the option "Modify filed return" to process a correction if necessary.
Identifying information, family unit and spouse's authorization
If you decide to start a new tax return, Renta WEB will display a window with the Identifying information of the declarant and the rest of the family unitAt the top you will see a box that you can check if you want the program to calculate only your individual tax return.
If you are part of a family unit and do not check that box, it will be necessary to process the authorization to consult the data of the spouse and children who have obtained incomeusing your reference or Cl@ve. This authorization is key for the program to compare the joint and individual options and indicate which is the most favorable.
In the spouse authorization section you will find a button to “Reference/Cl@ve”This will open a pop-up window where you can enter the reference or identify yourself with Cl@ve Móvil, indicating your ID/NIE number, verification data, and confirming the authentication. If you have a power of attorney (for example, a 100P power of attorney) in your favor, this step can be simplified, as the authorization is considered granted and the data is transferred directly.
In that same window of identifying data you can modify or add informationMarital status, family situation, new family members, etc. Choose the pencil icon to edit or the cross to delete records. Remember that some data, such as family situation, cannot be modified later during the process.
If any taxpayer in the family unit is not required to file a tax return, a notice will appear on the screen for you to take into account.
Transfer of tax data and warnings
By accepting the identification data window, Renta WEB will check your tax information and may display a message asking you to Additional information to convey certain concepts to the declaration. You will see a data table with an "Incorporate" column where you can select "Yes" to have them transferred automatically.
Some of this information requires you to answer questions or provide additional details (for example, ownership percentages, dates, etc.). Once you have completed the necessary steps, you will be able to access the summary of statements and continue with the completion.
If some data is not automatically included, a preview window will appear indicating, individually for each taxpayer, exactly what information is missing. You can open the button “View tax information” to view explanatory notes and then manually fill in the amounts in the corresponding sections.
Summary of statements and navigation through sections
The "Tax Return Summary" in Renta WEB, also accessible from mobile devices, shows the results for the different filing methods (joint and individual) and indicates which is the most advantageous option. From each method you can Download a PDF with a preview unsuitable for presentation, ideal for reviewing at your leisure.
At the top you will see a menu that allows you to:
- Consult the tax data transferred to the declaration of each declarant.
- Access the different blocks and boxes using the button “Declaration sections”.
- Display additional options such as saving the declaration on the AEAT servers, consulting identification data or searching for a specific box.
- use button "Grades" to record internal reminders about completion.
All of this is also available if you work on Renta WEB from your mobile browser, although the experience may be more comfortable on a larger screen. In any case, it works the same way.
Validation, warnings and errors before submitting
Before submitting the declaration, it is essential to click the button "Validate"Renta WEB will review all the information and show you any warnings and errors, if any.
The announcements They do not prevent the submission; they simply recommend reviewing certain sections. errors Yes, they block the submission until you correct them. You can go directly to each notice or error using the "Go to Notice" or "Go to Error" buttons.
In some cases, a will appear "Warning" which you must read. To confirm that you have seen it, you will have to check the “Read/Hide” box; if you do not, Renta WEB will not let you continue and will display a message asking you to review the warnings before submitting.
Choice of refund or payment method in Renta WEB
If the result of the tax return is a refund, you can choose between different refund methods:
- Transfer to an account in Spain or in an EU/SEPA bankBy default, the IBAN from the previous year will appear, which you can change if you want to specify a new one.
- Transfer to a financial institution outside the EU/SEPA areaIn this case, you must complete all the account details: bank, city, address, and country. The SWIFT-BIC field is optional, but the country code cannot be an EU/SEPA country.
- Waive the refund in favor of the Public Treasury, an option that is used in very specific cases.
If the result is to enter, you will first have to decide if you want to split the amount into two payments Or not. Then, several payment options will be displayed:
- Direct debit of the total amount or the second installment, valid in Spanish accounts and also in accounts in the EU/SEPA area.
- electronic payment by direct debit (generating NRC at the moment), card or Bizum, connecting with the online payment gateway or with the banking app associated with your Bizum.
- Recover a previous payment using NRCIf you have already made the deposit from your bank (at a branch or online banking), enter the NRC in the corresponding field, or use the option to modify or delete it if there are errors.
- Bank/Cash Deposit Document which generates a payment letter (model 002) and leaves the declaration pending payment at the financial institution.
- Other payment methods, such as acknowledgment of debt with inability to pay, request for deferral, compensation or transfer to an account of a non-collaborating entity, among others.
In joint statements, it is noted that it will be necessary to indicate the Reference or identification with Cl@ve of the spouse or child involved, even if you have identified yourself with another system (Cl@ve, certificate or DNIe). The reference number is always individual for each declarant.
Signature, submission and receipt in Renta WEB
When you have everything ready, a final window will appear where you must Check the "Agree" box and click "Sign and Send"If there are any warnings, you will be reminded of them before signing, and you can continue if you agree to proceed.
After successful submission, Renta WEB will display a message confirming your submission was successful and a new Secure Verification Code (CSV)In addition, a PDF is generated that includes on the first page the presentation data (registration entry number, CSV, receipt number, date and time, and presenter data) and on the following pages, the complete declaration.
From your mobile you can save or print the PDF as proof. In declarations with acknowledgment of debt, the response sheet itself contains a "Process debt" link, from which you can request deferral, compensation or make the corresponding payment.
If you later return to “Renta WEB. Draft/Declaration Processing Service (Renta WEB)”, in the “File History” section you will see the entry of “Recording of his statement” with the submission date and the message at the top indicating that your declaration is being processed.
Access Renta WEB with electronic certificate or DNIe from your mobile phone
Another widely used method for filing your tax return from your smartphone, especially if you are already a regular user of digital certificates, is the access with electronic certificate or electronic ID cardThe flow is very similar to that of Cl@ve Móvil, with the advantage of strong identification from the first moment.
Go to the Tax Agency website, access the Income Tax campaign and, within “Featured Procedures”, click on “Draft/Tax Return Processing Service (DIRECT Income Tax and WEB Income Tax)”On the next screen, select "Certificate or electronic ID," choose your certificate, and confirm the authentication.
Once inside, the remaining steps are practically the same as those described for Cl@ve Móvil: select the type of action (on your own behalf or as a representative), access the file, use “Continue session” or “New declaration”, review identification data, authorize the spouse and children if applicable, transfer tax data, validate, choose payment or refund method and submit.
After the presentation, the system will display the success message, the CSV file, and generate the PDF document with registration details and the submitted declarationwhich you can save or print from your mobile phone exactly the same.
With all these options on the table, it is perfectly possible today Manage your tax return from start to finish from your smartphoneWhether using the official AEAT app for faster procedures and the submission itself, or taking advantage of Renta WEB in the mobile browser when you need to go into detail and modify the draft.
The key is to combine convenience and rigor: carefully review the data, take advantage of the validation tools, choose the correct payment or refund method, and always keep the proof of submission to have everything under control if you need to consult it in the future.
