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What HMRC's answers mean in plain English, and what you can check yourself. Every entry comes from a real case. Search by HMRC's code, or by what you were doing.
Signing up and connecting to HMRC
HMRC say the Government Gateway account you connected is not signed up for Making Tax Digital for Income Tax under this National Insurance number.
HMRC have another business or property income registered under your National Insurance number. Each one needs its own quarterly updates, so FileThat shows it and offers to set it up.
Quarterly updates
HMRC say the start date of this update does not match the quarter type they hold for this business. Standard quarters start on 6 April and calendar quarters on 1 April.
HMRC already hold figures for this business up to a later date in this tax year, and an update cannot end earlier than that. Send the update that ends on or after that date instead.
HMRC have a date recorded for when this business stopped trading, and these dates go past it. Use dates that end on or before that date. If the business has not stopped, HMRC's record needs correcting first.
Every quarterly update covers the tax year so far: from 6 April on standard quarters, or from 1 April on calendar quarters, to the end of the quarter.
Year end and the tax return
The final declaration can only be made once the tax year has ended, from 6 April.
Agents and accountants
Supporting agents can send a client's quarterly updates, but HMRC do not let them view the client's tax calculation, finalise their tax position or submit their tax return.
Problems HMRC have listed as open, which nobody can fix from their own software.