You can create sales voucher with tax on MRP. Enable the option Allow MRP/Marginal for stock items? in F12:Configure while creating the stock item.
To record sales transaction with tax on MRP
1. Go to Gateway of Tally > Accounting Vouchers > F8: Sales.
2. Select the customer name in the Party’s A/c Name field.
3. Select the required Sales Ledger.
4. Select the stock item for which Calculate VAT on MRP is enabled and enter the Quantity, and Rate.
5. Select the common VAT ledger. The rate will be calculated automatically based on MRP defined for the item.
The sales invoice appears as shown below:
6. Enter Narration, if required.
7. Press Enter to save.