You can create journal vouchers to adjust the decrease in CST.
To create journal voucher for decrease of CST
1. Go to Gateway of Tally > Accounting Vouchers > F7: Journal.
2. Click J: Stat Adjustment. In the Stat Adjustment Details screen,
o Select the option VAT in the Type of duty/tax field.
o Select the option Decrease of CST in the Nature of adjustment field.
o Select the option Rebate in Additional Details field.
o Press Enter to save and return to voucher screen.
3. Debit the CST ledger.
o Enter the Rate and Assessable Value in the VAT Details screen.
o Press Enter to return to voucher screen.
4. Enter the amount in the Debit column.
5. Credit the ledger grouped under Indirect Incomes.
6. Set the option Provide VAT Details to Yes and enter the From and To dates, else retain it as No.
7. Enter Narration, if required.
The journal voucher appears as shown below:
8. Press Enter to save.