A request (requerimiento) from the Spanish Tax Agency is not a penalty, but ignoring it can be expensive. The first step is to read carefully what it asks for and, above all, what deadline it gives you.
The deadline is the one stated in the notice. In many cases the minimum is 10 days counted from the day after notification. If it is counted in working days, Saturdays, Sundays and public holidays are excluded. Always check your own notice, because it may differ.
If you can't make it in time, you can ask for an extension of up to half the original deadline. Request it as soon as you can and always before the deadline ends, explaining why you need it.
Failing to comply with a properly notified request can be an offence of resistance or obstruction (article 203 of the General Tax Act). If documents are missing, the authorities can also adjust your tax with the data they hold, with a possible additional assessment and penalty.
This article is for information only. Every request has its own details and should be reviewed before you respond.
Source: Administrativando: tax office requests, deadline and how to respond (in Spanish). Last reviewed: 23 October 2026.