How to remove tax on an existing invoice

To remove a tax from an invoice, you just have to do the below steps. 

1. Go to the Sales screen > Search for the SO number > Open the Order
   
   

   Open

   

2. In the SO screen click the Invoice Tab, and open the Invoice number.

   Open

   

3. In the right upper corner, click the MENU icon, you can see the Sales Order Settings, click the settings.
   
   

4. In the screen Update the Sales Tax % to be 0.00

5. Save the changes by clicking the Save button.

6. Close the Invoice screen.

7. Re-open the invoice number (top right), and it should load and populate the changes. Tax should be 0.00.
   
   

8. Click RENGERATE INVOICE at the bottom here so it updates the PDF so you can send it out to the customers.