How to Change GST Rate of Item in Middle year without effecting old transacton?

To Change GST Tax Rate in middle year without effecting Older transaction, please follow below Steps :
Step 1 : Before making any changes, make a backup of all your existing data to ensure you can go back to it if needed.
Update GST Tax Rates for All Items:
Step 2 : Make sure you update the GST tax rate for all items of That Tax Category to the new rate or specific Items Only.
ModiFinancial Year Tax Category Master:
If Tax Changed to all Items than
Step 3 : Go to the Administration Menu, then select Masters and choose Tax Category and Select ModiFinancial Year Mode.
Step 4 : select Tax Category Master in which you wantr to Change Tax Rate and Look for the Change in Tax Rate section within Tax Category Master.
Step 5 : In the Change in Tax Rate section, provide the date from which you want the new GST tax rate to be applicable.
Update the new tax rate and save the changes.
If the tax change is only for specific items
Step 6 : Go to the Administration Menu, then select Masters and choose Tax Category and Select Add Mode.
Step 7 : Provide Name the new category and input the old tax rate in GST Rate information.
In the Change in Tax Rates section, speciFinancial Year the new tax rate along with the effective date, and save it.
Step 8 : Change the Tax Category Master for those specific items to the new one you created.
You can use the Bulk Upload Master option to do this efficiently.
By following these steps, you can apply the new tax rates to your items without affecting the records of older transactions.