Tax Settings
You can set your tax rate by navigating to Settings > Shops > [Shop Name] > Tax rates. Here, you can add in the rate you'd like to charge for tax on your invoices.
You have the option to activate or deactivate the tax rate by clicking or unclicking the "Is Active" checkbox. You can also set a particular tax rate as the default rate and it will be added automatically. If you have multiple tax rates and do not have a default, you will need to select the correct tax rate on the invoice each time.
Please make sure your tax settings in Shop Manager correctly reflect your tax settings in QuickBooks. A mismatch may cause an issue with syncing your invoices and payments to QuickBooks.
You can select whether or not a line in your canned job is taxable or not by clicking the "Taxed" checkbox. In many states, installation/maintenance labor is not taxable. It is your responsibility to be aware of the rules and regulations for your state regarding tax.