Hello there, shopmichelleandr,
If you're not sure about charging sales tax to your customer, I recommend checking with an accountant or a legal adviser.
QuickBooks Self-Employed focus on federal estimated taxes of your self-employed income. Sales tax is levied by state and local governments, we can't help you calculate how much you're collecting or what you need to pay.
You can check this article for more information: How we approach sales tax.
Please feel free to leave a comment below if you need any further assistance.