What is the MTD Final Declaration?

The Final Declaration replaces your annual Self Assessment tax return. It's filed after the end of the tax year (5 April) and is due by 31 January of the following year, the same deadline as the old Self Assessment return. In the Final Declaration, you confirm your total income and expenses for the year, make any adjustments, and finalise your tax position. August guides you through the Final Declaration process step by step. Read the full guide on how to file your Final Declaration.