Let me step in and help you with your sales tax in your QuickBooks Online account. Once you updated your Sales Tax, you can no longer get back to the old sales tax feature. However, you can set up your sales tax and make sure that the address from your customer filled out correctly since automated sales tax will be based on those addresses.
You can follow these steps on how to set up your sales tax. Here's how:
To add a tax rate and agency:
From the left menu, go to the Taxes tab.
Under the Related Tasks list on the right, click the Add/edit tax rates and agencies option.
Select New, then choose either a single or a combined tax rate.
Enter a name for the tax, the agency you pay, and the percentage for the rate.