You have to enable Is Inclusive of duties and taxes? at the stock item master to define the price of the stock item including tax.
To record inclusive of tax sales transaction
1. Go to Gateway of Tally > Accounting Vouchers > F8: Sales .
2. Select the party ledger in Party's A/c Name field.
3. Select the sales ledger with taxable nature of transaction.
4. Select the stock item for which the option Is inclusive of duties and taxes? is enabled.
5. Enter the Quantity . The Inclusive of Tax screen appears as shown below:
o Enter the Rate (Inclusive of Tax) .
o Press Enter to save and to return to sales invoice.
6. Select the common VAT ledger. Based on the VAT rate, amount is automatically displayed.
The sales invoice appears as shown below:
7. Enter Narration , if required.
8. Press Enter to save.