I e filed in early March. With a recent update to Turbo Tax, my refund has increased. How do i refile my e file to get the additional refund (refund not received yet)

Did you enter any unemployment?  Do not amend for that.  The IRS will adjust it for you.   Or can you tell why it increased?

In a stupid move, I forgot a w2 for a 2 week job. I need to add that and resubmit.