Hello there, @LupitaG-2019.
I'd like to add additional steps to what john-pero provided above on how you can add sales tax on your invoices.
Adding sales tax on invoices can be done in just a few clicks.
For complete details about setting up sales tax, please check out this link: Set up sales tax in QuickBooks Desktop.
Once done, you can create an invoice or an estimate, and a tax column will now appear on your sales form. I've attached a screenshot for your visual reference:
There you go!
Please let me know how it goes by leaving a reply below. I'll be here if you need further assistance. Thanks for choosing Quickbooks, LupitaG-2019!