https://help.tallysolutions.com/docs/te9rel60/Tax_India/VAT/West_Bengal/WB_Sale_Incl_Tax.htm

Recording Sales Inclusive of Tax (West Bengal)

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's A/c Name.

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.

o     Enter the Godown, Quantity, Rate and Amount.

o     Press Ctrl+A to save, and to return to sales invoice.

The Stock Item Allocations screen is displayed as shown below:

5.    Select the common VAT  ledger. Based on the VAT rate, amount will be automatically displayed.

The sales invoice appears as shown below:

6.    Press Enter to save.