My income tax assessment is way too high — how to handle?
Objection + payment deferral within 6 weeks. Substantiate with return corrections + evidence (year-end statements, expense receipts, mortgage interest).
Common causes of a too-high IB assessment: (a) forgotten deductions (mortgage interest, donations, medical, study); (b) unprocessed payroll tax from job change; (c) wrong income estimate on provisional assessment; (d) ex officio assessment on non-filing. Plan: (1) check final assessment vs your return — discrepancy = request substantiation; (2) gather evidence for missed deductions; (3) file objection within 6 weeks of date stamp with clear recalculation + relevant Wet IB articles; (4) SIMULTANEOUSLY request payment deferral with the Collector — otherwise collection continues. On partial win: standard objection decision. On full rejection: appeal to tax court within 6 weeks (€51 court fee 2026).