I’ve got some information to share with you today, @Rosie A.
In QuickBooks self-Employed, all categories are set based on the Self Assessment SA103F from HMRC.
If none of them fits this contribution, it would be best to contact your accountant for advice. They can further assist you with this matter to make sure it falls in the correct category.
You can also visit this article here to learn more about SA103F Categories. This reference provides descriptions, tips, and SA103F box numbers. I’m sure you’ll find it helpful.
Let me know if you have any other questions. I'm a few clicks away to help. Keep safe, and have a great day!