Before you can use Tax Authorities on invoices and other transactions, you need to combine the authorities into Tax Groups. A Tax Group is a collection of one or more taxes that apply to a certain type of customer.
Tax Groups List
Group ID - Enter the name for this tax group.
Description - enter the description (optional) for your tax group.
Tax ID - using the drop down list, select the first tax authority to go into this group. Tax Authorities may be present in different groups, but you cannot put the same Tax Authority into the same group twice. Press the "ADD" button to include that tax authority into the current tax group.
If another Authority is required for this group, then press the "CLEAR" button and repeat the process to add a new Tax Authority.