Gift Aid is controlled at the allocation level, allowing you to exclude specific parts of a transaction if needed.
Exclude a Transaction from Gift Aid
Navigate to the constituent’s Timeline and open the transaction.
Expand the Allocation section by clicking the down arrow.
Locate the Potentially Gift Aid-able field.
Change the value to No.
Click Save changes.
If a transaction has more than one allocation you can set the gift aid status of each allocation in turn.