How do I deduct tax from amount?

You can enable “Deduct tax from amount” in purchase frame.

• Go to Menu Transaction > Purchase
• Enable “Deduct tax from Amount”                                                                                                                                                                                                                                 OR you can also enable “Deduct Tax From Amount in Purchase” from configuration
• Go to Setup > Configuration > Inventory Setting.

• Enable “Deduct Tax From Amount in Purchase” Then tax will be deduct from amount.