https://help.tallysolutions.com/docs/te9rel60/Tax_India/VAT/Assam/AS_Pur_Retn.htm

Recording Purchase Returns (Assam)

Record purchase returns in debit notes for taxable goods. Specify the VAT rate in Company Details screen.

To record a debit note for purchase return of taxable goods

1.    Go to Gateway of Tally > Accounting Vouchers > Ctrl+F9: Debit Note.

2.    Enter the Original Invoice Number and Date of the purchase invoice against which the debit note is recorded.

3.    Select the required Party’s A/c Name from the List of Ledger Accounts.

4.    Enter the required details in Party Details screen.

5.    Select the common purchase ledger.

6.    Select the required taxable stock items.

7.    Enter the Quantity and Rate.

8.    Select the required common VAT ledger.

     The ledger must be grouped under Duties & Taxes in which the options:

o     Type of Duty/Tax is set to VAT.

o     Percentage of Calculation is set to zero.

9.    Set the option Provide VAT Details to Yes to open the Statutory Details screen.

The debit note screen appears as shown below:

10.  Press Enter to save.