I've got a material that you can refer to help you decide which category to use, @audinphotography.
While we're unable to provide which expense category to use for a specific transaction, you'll want to check the Schedule C Categories breakdown to determine which one matches, and use it in tracking your transactions.
Moreover, I'd still recommend consulting your accountant for further guidance and to ensure your books' accuracy. If you’re not affiliated with one, you can check our ProAdvisor page and we’ll help you find there.