The reference number allows you to manage all the campaign services, from consulting your tax data and the draft of your declaration, to its subsequent processing, regardless of the result.

We recommend that you obtain the reference from the APP of the Tax Agency , which allows you to have simpler access to the most used services throughout the Income campaign.

You can also obtain the reference number through the Internet at the Tax Agency's electronic headquarters at the link obtain your reference number . To access this service, it is essential to identify yourself with Cl@ve PIN, with an electronic certificate or electronic DNI or by the amount in box 505 of your 2021 Income Tax return (if the amount is 0 or you did not submit the return, you must provide the IBAN of your bank account).

In the video we show you how to obtain the reference number with box 505.