Hi Sanhey,
Welcome to Community! QuickBooks Desktop enables you to apply sales tax to your forms effortlessly. I'd be happy to help!
When you set up your sales tax rates, you can set them as default to your products and services. This is a valuable time saver when creating forms. Here's a helpful guide for your reference. Should you require additional assistance, please don't hesitate to contact us. Your time is valuable and we would enjoy the opportunity to work with you personally, and ensure you're able to accomplish your QuickBooks goals without delay!
Feel free to reach back out with other questions. We'd be glad to assist!