How to claim cenvat if import PO isn't having modvat flag at PO level and recoverable flag at receip

Hi,

There is one import PO where Modavat flag wasn't checked at PO level for CVD and additional CVD . Also recoverable flag wasn't checked at receipt level.  Hence we aren't able to see in claim modavt form. Is there any way out .Note:  Item classification setup in place already

Is there any form where we can manual adjustment

Or

Only RTV is the possibility. Do RTV-- enable modvat flag at PO level---create receipt with recoverable flag.

Highly appreciated your valuable inputs

Regards,

Vijay