Step 1: Open TallyPrime and Select Your Company

Launch TallyPrime on your computer and select the relevant company for which you want to update GST rates.

Step 2: Navigate to GST Rate Setup

From the Gateway of Tally, press Alt + G (Go To), type GST Rate Setup, and press Enter.
Alternatively, navigate via:
Gateway of Tally > Display More Reports > Statutory Reports > GST Reports > GST Rate Setup

Step 3: Update GST Rates in Stock Items, Stock Groups, or Ledgers

Select the master type you want to update (e.g., Stock Items, Stock Groups, or Ledgers).

You can update GST rates for individual items or multiple items grouped under the same HSN/SAC code.

Press Alt + R to move to the stock group or item and press Alt + S to set the rate.

Enter the new GST rate (for example, change from 18% to 12%). The integrated tax rate entered will automatically divide equally into central and state GST.

Press Ctrl + A to save the changes.

Step 4: Apply Changes and Save

After updating GST rates for all relevant items or ledgers, ensure you save the changes by pressing Ctrl + A. The updated GST configuration will be applied to all future transactions.

Step 5: Verify Updated GST in Invoices

Create a sample invoice to verify if the updated GST rates reflect correctly in the tax calculations. Check for changes specific to the product or service updated.

Pro Tip:

Always back up your company data before making major GST updates to avoid accidental data loss.