Your Square total is lying to you
Most solo shop owners think Square is the books.
It isn't.
Square shows card. Tips walk out in cash. Booth rent hits a different account. Product sales mix in. By March you have 11 months of "I think we did okay" and a CPA asking for a P&L that doesn't exist.
The fix is boring and it works:
One folder. Square CSV every Sunday night.
Cash drawer count on paper. Photo is fine.
Separate tips from service. Always.
A monthly P&L with three lines that matter: chair revenue, product, expenses.
If you can't answer "what did the chair actually make last month" in 30 seconds, you don't have books. You have a payment app.
That's the whole job.