You can't edit or delete transactions included on a VAT Return.
To correct an error on your submitted VAT Return, reverse the transaction. Then re-enter it with the updated details.
For transactions included on draft VAT Returns, delete the draft VAT Return. You can then amend or delete the transaction.
If you include a supplier payment in error on a VAT Return using Cash Accounting, you must reverse it.
If you've allocated the supplier payment to an invoice, unallocate it first. See unallocate purchase transactions for guidance.
To reverse the supplier payment, create the opposite transaction; a Supplier Refund.
Any corrections that you make will appear when you create your next VAT Return.