Hello marshallplumbing1,
Welcome to Community! QuickBooks Online automatically calculates your sales tax based on government guidelines. To ensure you're applying the appropriate tax, I recommend reviewing the available information here.
If you're not certain as to how you should proceed, I recommend speaking with an accounting professional for their expertise and best course of action. If you don't have an accountant, we can help you locate a ProAdvisor in your local area. Click here to learn more about setting up non-taxable and after tax deductions in QuickBooks Online.
If you have any other questions, feel free to reach back out. We would be glad to help!