Hello there, Ann21,
You can manually add the transaction and select the correct category. This is an expense transaction. Here's how:
These are the available SA103F categories in QuickBooks Self-Employed: About SA103F Categories.
You can also consult with your accountant to make sure you're using the correct category for this expense transaction.
If you have other questions about QBSE, don't hesitate to post here in the Community.