TaxSimba — MTD Standard or Calendar Update Periods: Which Should You Use?
Preparation worksheet

Optional offline planning aid, not a tax return or filing confirmation.
Keep completed notes securely; never include passwords or one-time codes.

WORK THROUGH THIS EXAMPLE
Before comparing an export with an update, recover the first submission and the selected standard or calendar basis. A period ending on 30 September is not interchangeable with one ending on 5 October. Keep the same basis visible throughout the year.

DECISION TO RESOLVE
Which reporting basis does the existing submission evidence show?

YOUR POSITION
Relevant year and source: ____________________
Evidence supporting your answer: ____________________
Missing item and who will obtain it: ____________________
Deadline or next review date: ____________________

1. Record the accounting year-end and chosen periods.
Notes: ______________________________

2. Save the current software setting.
Notes: ______________________________

3. List earlier update acknowledgements.
Notes: ______________________________

4. Check each cumulative start and end date.
Notes: ______________________________

5. Share the period choice during any handover.
Notes: ______________________________

Actions agreed and responsible person:
____________________________________

Guide: https://taxsimba.co.uk/blogs/mtd-standard-vs-calendar-update-periods
Check the current guide and official sources before relying on a deadline or process.