https://help.tallysolutions.com/docs/te9rel60/Tax_India/VAT/Goa/GA_CST_Adj.htm

Adjustment Towards CST (Goa)

You can create a journal voucher to record the stat adjustment towards CST.

To create a journal voucher for adjustment towards CST dues

1.    Go to Gateway of Tally > Accounting Vouchers > F7: Journal.

Note: You can create a journal voucher from Gateway of Tally > Display > Statutory Reports > VAT > select the VAT or CST form.

2.    Click J: Stat Adjustment. In the Stat Adjustment Details screen,

o     Select Type of duty/tax as VAT.

o     Select Decrease of Input Tax, as the Nature of adjustment.

Note: Based on the selection made for Nature of Adjustments, the Additional Details option will appear or disappear.

o     Press Ctrl+A to return to the voucher.

3.    Debit CST ledger. Enter the CST Rate and Assessable value in VAT Details screen. Enter the tax amount.

4.    Credit the input VAT ledger. Enter the VAT Rate and Assessable value in VAT Details screen. Enter the tax amount. The journal voucher appears as shown below:

5.    Press Enter to save.