Whats The Tax Deadline 2024. The belgian tax authorities (i.e., fps finance) announced that the prepayment system is operational as from 2 september 2024 (see nl / fr). Tax return for seniors, is april 15, 2024.
The main deadline for filing your 2024 federal income tax return is april 15, 2025. January 16, 2024 is the fourth and final installment deadline for tax year 2023.