Once the Price Levels are created in Tally.ERP 9, a new option appears in Ledgers grouped under Sundry Debtors and Sundry Creditors, with the help of which you can assign a specific Price Level to the ledger account.
Go to Gateway of Tally > Accounting Info > Ledgers > Create
You can choose the Price Level that you want to assign to the Ledger, by selecting the Price Level from the Price Levels list in the Pricing Level Applicable field. Select Not Applicable, if you do not want to assign any Price Levels to the Ledger.
If you want to assign Price Levels to ledgers created earlier, alter the ledger account, tab down to Pricing Level Applicable field and select the applicable price level from the list.
Note: For a Ledger, you can only assign / tag only one Price Level at a time, however you can change the Price Level selection depending upon your requirement in alteration mode or during Voucher Entry.