You can record a journal voucher for decrease in sales.
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 the option VAT in the Type of duty/tax field.
o Select the option Decrease in Sales in the Nature of adjustment field.
o Press Enter to save and return to voucher screen.
3. Debit the interstate sales ledger.
4. Enter the amount in the Debit column.
5. Debit the CST ledger.
o Enter the Rate and Assessable Value in the VAT Details screen.
o Press Enter to return to voucher screen.
6. Enter the amount in Debit column.
7. Credit the interstate sales ledger predefined with the nature of transaction Interstate Sales Exempt .
8. Set the option Provide VAT Details to Yes and enter the From and To dates, else retain it as No .
9. Enter Narration , if required. The journal voucher appears as shown below:
   
10. Press Enter to save.
The states with Decrease in Sales available as the Nature of Adjustment are given below:
| 
      State Name  | 
    
      Nature of Adjustment  | 
    
      Additional Details  | 
    
      Voucher Entry  | 
   
| 
      Bihar  | 
    
      Decrease in Sales  | 
    
      ---  | 
    
      Debit: Sales ledger with nature of transaction provided for taxable interstate sales. Debit: CST ledger. Credit: Sales ledger with nature of transaction Interstate Sales Exempt .  | 
   
| 
      Gujarat  | 
    
      Decrease in Sales  | 
    
      ---  | 
    
      Debit: Sales ledger with nature of transaction provided for taxable interstate sales. Credit: Sales ledger with nature of transaction Interstate Sales Exempt .  | 
   
| 
      Jharkhand  | 
    
      Decrease in Sales  | 
    
      Sales Outside the State  | 
    
      Debit: Sales ledger with nature of transaction provided for taxable interstate sales. Credit: Sales ledger with nature of transaction Interstate Sales Exempt .  | 
   
| 
      Maharashtra  | 
    
      Decrease in Sales  | 
    
      Deduction U/s 6A of Earlier Law (On Going)  | 
    
      Debit: Sales ledger with nature of transaction Sales - Works Contract - Ongoing . Debit: VAT ledger Credit: Sales ledger with nature of transaction Sales Exempt - Works Contract - Ongoing .  | 
   
| 
      Punjab  | 
    
      Decrease in Sales  | 
    
      ---  | 
    
      Debit: Sales ledger with the nature of transaction Interstate Sales - Against Form C . Debit: CST ledger. Credit: Sales ledger with the nature of transaction Interstate Sales - Exempt . Credit: Branch/division ledger.  | 
   
| 
      Uttar Pradesh  | 
    
      Decrease in Sales  | 
    
      ---  | 
    
      Debit: Sales ledger with nature of transaction provided for taxable interstate sales. Credit: Sales ledger with nature of transaction Interstate Sales Exempt .  | 
   
'Decrease in Sales (VAT)' has been shared with
