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

Enabling VAT (West Bengal)

You need to enable VAT in the F11: Features of your company to start using VAT features in Tally.ERP 9.

To enable VAT

1.    Go to Gateway of Tally > F11: Features > Statutory & Taxation. The Company Operations Alteration screen appears as shown below:

2.    Set the option Enable Value Added Tax (VAT)? to Yes.

3.    Enable the option Set/alter VAT details? to open the Company VAT Details screen.

4.    Configure the VAT details, as explained in the To Configure VAT details section.

5.    Enter the PAN/Income  tax. no.

6.    Enter the Corporate Identity No. (CIN).

7.    Press Enter to save.

To configure VAT Details

1.    Click F12: Configure to view the Configuration screen.

2.    Select the state as West Bengal from the List of States (if the state is not selected in the Company Creation screen).

3.    Enter the 11 digit TIN allotted by the VAT department.

4.    Enter the Interstate sales tax number, if required.

5.    Enable Set/alter tax/rate details? to view the Tax/rate Details screen. A single VAT rate  for all stock items in a company, can be defined in this screen.

6.    Enable the option Define VAT commodity and tax details as masters? if separate VAT classifications have to be created for each tax rate. These classifications can be applied to ledgers, stock items or stock groups.

7.    Set the Enable VAT on quantity? to Yes (enabling this option will allow tax calculation on quantity).  

8.    Press Ctrl+A to accept the Company VAT Details screen.