Why can it not simply be deleted?
A processed document is part of the accounts and may already be linked to a booking or return. Removing it without a correction trail would make the records incomplete.
Request a correction
Open the relevant document.
Check which information is incorrect.
Use the correction action if available, or ask a question on the document.
Briefly describe what needs to change and why.
Your accountant reviews the correction and processes the correct booking.
Submitted twice
For a duplicate, also state which copy should remain. Do not submit the same file again while the correction is being reviewed.