Thank you for posting here in the Community, @hihtatafu.
You can use the Transaction/processing fees category to record the expenses you pay to the company for processing payroll on your behalf. If you're unsure of what to use when recording transactions, I suggest choosing what makes the most sense to you for it to show correctly in Schedule C.
Visit the following articles below for additional guidance about what you should choose during the process. It also provides any updates that involve the categories:
Stay in touch whenever you have additional questions about QBSE. I’m here to make sure you’re taken care of. Have a great rest of the day.