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https://help.tallysolutions.com/docs/te9rel66/faqs/9135.html

Selecting the trade name in accounts or inventory masters from Release 5

The trade name can be selected in the VAT details screen of the stock group/stock item/ ledger.

To select the trade name

1. Click F12: Configure .

2. Set the option Provide Trade Name to Yes .

3. Press Ctrl+A to accept the screen.

4. Press Ctrl+C in the option Trade Name .

5. Select the Trade Name from the list.

6. Select the Calculation Type .

7. Enter the Tax  Rate and Surcharge based on the Calculation Type .

8. Press Enter to save.

The exception is now resolved.