Which card do u think would be an upgrade?
I don't you will get upgrade from Paytm Citi. But you can apply fresh application and get 5000 vouchers also as part of current offer.
But apart from that, I don't find any Citi card interesting. Also, they don't give LTF easily.
BTW, how do you share ITR with bank? Just the one page acknowledgement page or full 50-100 pages long ITR?