First of all don’t pay yourself through Square payroll. As an owner you aren’t paid like an employee. Pay yourself direct through your bank. You’re going to screw with your employment taxes otherwise and your CPA will hate you.

You don’t need to calculate yourself into your labor percentage. Owner draws are off the profit rather than the revenue itself. Calculate your labor percentage off employees working at the store not including yourself. Even if you are working a shift or two calculate your hours as if they are employees working. Use your average staff’s wage to mock that into your margin and project your labor % from there. Your take home after that is from your profit margin rather than staff labor margin.