Thanks for the details, Rosco.
The reporting of VAT depends on the date of the transactions and if it's an accrual or cash basis.
For example, if the accounting method of the transaction is accrual and dated March, the filing period would be February.
We'll have to make sure that the transactions were entered in QuickBooks.
I've added these articles that talk about reporting VAT to HMRC:
Just let me know if there's anything else that I can help. I'll always be right here!
