Format of purchase invoice against purchase of goods from unregistered or composite dealer.

Yes you are correct no more logic. You can made self invoice for URD only. Not, composition dealer. Self invoice using for yourself... please read the following steps...
1. Purchase from URD Rs. 1000 @ 18%
2. You ll be pay Tax Rs. 180 under RCM. Where to note the tax amount. You can't write URD's bill.
3. You enter the value to the book URD purchase 1000 tax 180. But, bill is only 1000.
4. If we prepare self invoice URD and also enter tax.
5. Above said we can calculate tax easily and books of accounts maintain also easy...

Now, You got any logic.....!?

Logic is you will get itc benefits if you raise invoice

It's mean not raise invoice. Just prepare invoices for your convenient....

Tax invoice is prepared under RCM by registered

can i use my own printed tax invoice, which is used to raise against my own sale.

YES YOU CAN USE YOUR OWN INVOICE. BUT, IT GET SOME REQUIRED DETAILS IN INVOICE BASED ON GST RULE

Can you please provide me a format.

Tax invoice format which you use in sale used as invoice for RCM

You ll download Sample  invoice format in following link

 

/share_files/gst-invoice-formats--73506.asp