Hi salgado1,
It's a pleasure to see you in Community. Welcome back! Creating a credit memo in QuickBooks Online is a great way to reduce the customer balance on their next invoice. However, when it come to sales tax, this can cause a negative impact on other areas of your books. In this situation, I recommend reaching out to your accountant 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.
Should any other questions come to mind, feel free to reach back out. We'd be happy to help!
