How to add MRP to an invoice?

First go to “document settings”.
Click on “add custom fields” and select “new custom field”
Now, add name of your “custom field” and select “type” i.e “MRP” & “number”. Hit “save” & then “update settings” and done.

As you create your invoice you will notice an additional MRP coloumn has been added to the invoice.

Watch this video to know more.