Procedure to file ITR of LLP which got converted in to Pvt Ltd Co.

Dear all,

Kindly guide me on below matter.

We converted LLP in to Pvt Ltd co during December 2020 which has loss in FY 2019-20.

Now we have to file 2 ITR (simultaneously), one for LLP and another for Pvt Ltd Co.

Question is, How do I claim B/f loss of LLP in to Pvt Ltd co when we are filing ITR for same year.