Hi there,
QuickBooks Self-Employed is designed to be the greatest asset to your business as a solo-entrepreneur! With tons of great features like the bank feed and simple data-entry, you'll be amazed at how much time you save. I'd be happy to point you in the right direction if you're not sure how to categorize your expenses.
The first important step in this process will be to consult your accountant. Accountants are the best equipped to help you make the right category selection so that your books are in-line with proper accounting structures. If you're not already connected to an accountant, you can find one in your area here: Find a ProAdvisor.
Once you know which category to select, you can complete the task in your account by following the steps here: Categorize transactions in QuickBooks Self-Employed.
If you're running into any issues, or if you need extra assistance, our designated Self-Employed team can help get you back on track. You can touch base with them via email, or in-product using the QB Assistant.
Take care.