Click the Tax Settings tab, then click Edit 
.
Enter your tax vendor name in the Vendor Name field. Unless your vendor name for tax purposes differs from your firm name, enter your firm name.
Enter your firm's Address and Telephone number. The state/province field is used to configure tax settings.
In the Tax/Business No. and Tax/Business No. 2 fields, enter your firm's tax or business registration numbers.
Tax 1 is federal tax charged on fees or disbursements. Select this option if your firm charges Tax 1, and enter the Tax 1 rate if applicable.
Tax 2 is state or provincial tax charged on fees and disbursements. If your firm charges Tax 2, enter the rate.
Depending on your state/province tax regulations, select Tax 2 on Tax 1.
Click Save 
.