Your first update is easier when the records, software access and responsibilities are settled before the quarter ends.
Before the quarter
- Confirm your MTD start date and the businesses or property income covered.
- Choose and authorise compatible software.
- Connect bank feeds and agree how receipts will be captured.
- Decide who records, reviews, approves and submits the update.
During the quarter
- Record income and expenses digitally and regularly.
- Keep evidence for unusual or high-value items.
- Separate personal and business transactions.
- Resolve missing information before the quarter closes.
Before submission
- Review totals for obvious gaps or duplicates.
- Confirm the submission deadline shown in the software.
- Approve the update using the responsibility agreed with your agent.
- Keep confirmation of submission with the quarter's records.
Sources and review
This guide was reviewed against the following sources on 29 July 2026. Rules and guidance can change.