Foreign currency transactions - You can only edit non-critical fields on foreign transactions, if you need to amend a critical field, delete and re-enter the transaction.
Cause
Resolution
Edit the transaction
Go to Suppliers, then select the required supplier.
Select the Activity option, then select the required transaction.
If the credit is allocated to another transaction and you use the VAT Cash Accounting or Flat Rate - Cash-based scheme, unallocate the credit.
Press Edittransaction then make the required changes.
For some fields, in 'Item Line Details', press Edit.