Do you charge HST on leftover material used for new customers?

Hi AQCReno,

Welcome back to Community!  Having your transactions recorded accurately with the applicable sales tax is vital to remain in good standing with the CRA.  QuickBooks Online has an amazing feature to capture and calculate the sales tax on your products and services in accordance to the initial setup.  In this situation, it's best to reach out to your accountant for the best course of action.  If you don't have an accountant, we'll help you locate a ProAdvisor in your area. 

Please feel free to reach back out for any additional questions you  may have.  We'd be happy to assist!