In the Home window, click Vendors & Purchases on the navigation pane.
In the Tasks pane, right-click the Vendors icon and select Modify Vendor from the menu.
Select a vendor from the list and click OK.
Click the Taxes tab.
In the Tax Exempt column, click once to change
the status.
Click Save
and Close.
Note: Tax-exempt status always takes precedence. Once you have set up your tax exempt status in your vendor record, Sage 50 Accounting does not calculate the taxes during a transaction, even if the vendor usually charges it on a bill.