How can I print self invoice w.r.t. reverse charge u/s 9(3) ?

Entries involving reverse charge u/s 9(3) are entered in GST Docs -> Reverse Charge u/s 9(3) Data Form. This data form may also be accessed through voucher entry / main menu.

To print these entries as self invoice, you may select the entry and click on F7: Others -> Print Self Invoice.