If I change tax% of my products, will it get reflected in the previous invoices?

No, If you change tax% of your products, it won’t get reflected in the previous invoices.

In case if you just want to change tax% of product for a particular invoice there are 2 ways to do this:

  1. Delete and re-add the similar product after making changes in the product.
  2. Make Changes in the product which is already added up in the invoice.

For 2nd solution follow these steps mentioned below :

Step 1: Click on the added product in your invoice.

Step 2: Click on Edit .

Step 3: Click on Tax%, select the desired tax% and click on Update Item.