- The compensation of excess input tax over output tax not deducted in previous periods is a right of the taxpayer and not a tax option.
- The exercise of this right can be done in the self-assessment of the following tax period and can be modified within four years from the filing of the declaration.
- The criteria is based on rulings of the Supreme Court and the relevant articles of the General Tax Law and the Value Added Tax Law.
Source: serviciostelematicosext.hacienda.gob.es
Note that this post was (partially) written with the help of AI. It is always useful to review the original source material, and where needed to obtain (local) advice from a specialist.