When running my VAT return why is KEYPrime producing ‘VAT Return 1 of 2. See supplementary return’?

When the value of any corrections to your VAT for the period exceeds £10,000 (HMRC’s reporting threshold) KEYPrime will produce an additional ‘Supplementary report’ which you must submit manually. The amounts that appear in the VAT return 1 of 2 which goes forward for submission under MTD exclude the under/over figures.

VAT Return supplementary report 2 of 2 are the under/over amounts that need to be submitted manually by you to HMRC using their VAT652 form. In the example above the figure of 14,651.21 can be reclaimed and allocated against the second invoice created in KEYPrime.

See below link to get to the online VAT652 form.

https://www.gov.uk/guidance/check-if-you-need-to-report-errors-in-your-vat-return

Scroll down to the online form and follow the steps for manual submission