Selecting a Tax Code for an Expense that was Purchased for an Exempt Supply

HI C-5,

Welcome to the Community. QuickBooks Online is a great program that gives you the ability to easily track your sales and expenses. I'd be glad to help. 

Based on what you've described, I encourage you to contact an accountant. They'll be able to point you in the right direction regarding the tax code. If you don't have an accountant, we can help you locate a ProAdvisor in your local area. 

Let me know if you have questions, I'll be happy to help.