Common mistakes when filing income tax in Bizkaia

Bizkaia's income tax campaign begins April 15, with common errors including not reviewing drafts and overpaying. Taxpayers should verify their draft, as the tax authority lacks complete information. Including deductions for rent, children, donations, or home purchases can reduce tax liability. Changes in personal circumstances like residency or marital status, and choosing between individual or joint declarations, also require careful review to avoid issues.