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MTD Income Tax
Self-Assessment
How do I amend a previously submitted return?
Modified on Thu, 11 Dec, 2025 at 3:57 PM
Why am I getting an "authentication failure" error when submitting?
Modified on Thu, 11 Dec, 2025 at 3:51 PM
How do I file quarterly updates for MTD in Abratax?
Modified on Wed, 17 Dec, 2025 at 1:15 PM
Does signing up mean I have started MTD?
Modified on Wed, 17 Dec, 2025 at 1:06 PM