Modify sales tax item by item
You may need to charge a customer sales tax on purchases for personal use, but not on purchases for resale.
  1. Click Business.
  2. Double-click the invoice that you want to change.
  3. Double-click the item you want to change.
  4. Select or clear the Sales Tax check box, or enter a new tax rate in the Tax Rate box.
  5. Click Enter.
  6. When you are finished making changes, click Save and Done or Save and New.