If you aren't seeing sales tax appear on your contents estimate, there are a few things you can check to ensure that it gets applied correctly. First, go to the Contents Inventory page of the estimate.
On the right hand side of the Contents Inventory page is a Default Sales Tax section. Enter in the appropriate sale tax amount into section and it will applied to every item entered into the estimate after this point.
If the estimate is already written when you enter the Default Sales Tax, you will need to retroactively apply that sales tax rate to the existing estimates. You can doing this by going to the Inventory of Items page of the estimate, right clicking on each of the areas, and selecting the Sales Tax option in the list. This will bring up a pop-up window displaying the current default sales tax rate for your estimate. Simply click Ok on this screen and the sales tax will be applied retroactively to any items in that area .
Lastly, go to the Inventory Summary page of the contents estimate. At the top of this page, click on the Sales Tax button. This will open a pop-up window where you can choose how sale will be applied to the estimate. Be aware that if you select the "Include sales tax in unit cost" option, the tax amount will appear as $0.00 on the Summary page, because the sales tax will instead be added directly onto the original cost of each item.
If you want to manually enter the sales tax dollar amount, select the Override Sales Tax Amount option. This will require you to calculate the amount of sales tax that should be applied to the estimate.