If the tax rate is updated in the product details, to update the tax rate while duplicating/cloning the invoice, please follow the steps mentioned below:
Step 1: Go to Bills >> Click on More.
Step 2: Click on Duplicate.
Step 3: You will get a message Tax Mismatch Found >> Click on Fix Now.
Step 4: Click on Update to New Rate or if there are more than 1 product, you can click on Update All.
Step 5: The tax rate will get updated >> Click on Create.
