1. Go to Gateway of Tally > Accounting Vouchers > F9: Purchase .

2. Enter the Supplier invoice no. and Date as per the sales invoice received from the supplier.

3. In Party A/c name , select the supplier's ledger or the cash ledger.

4. Select the purchase ledger.

5. Select the required stock items, and specify the quantities and rates.

6. Select the central and state tax ledgers.

7. Press Enter to save.

The invoice received from the composition or unregistered dealers will not have tax in it. Hence, you need not select tax ledgers on such purchases.