Got box 110 of the Spanish VAT return wrong? How to fix it since 2024 (no more complementaria or rectificación)
You filed this quarter’s modelo 303, and two weeks later you realise box 110 –the VAT-to-offset balance you were carrying forward– wasn’t the right one. You put in too much, too little, or forgot it entirely. You search for how to fix it and find articles talking about filing a “complementaria” or asking for a “rectificación”, and you’re not sure which one applies to you.
The short answer is: if your quarter is Q3 2024 or later, neither. Since then there’s a single mechanism, the autoliquidación rectificativa (rectifying self-assessment), which replaces both for VAT.1 Let’s walk through it with the specific case of box 110, where this mistake is costliest because it carries a balance from one quarter to the next.