What Is a Supplementary Tax Return (“declaración complementaria”) and How to Correct Tax Errors on a Spanish Tax Return
The Spanish tax system is based on the principle of self-assessment, which means that taxpayers themselves are responsible for correctly calculating and filing their taxes with the Agencia Tributaria. This model, governed by Spain’s General Tax Law, simplifies tax administration but also increases the risk of making errors when filing returns for personal income tax […]
