I filed was rejected so I sent my taxes through paper mail instead. Got my state but no letter saying my taxes were rejected it's been 2 months and no federal? Why?

did you file for a refund.

Your status should be showing on the IRS site.

If not, sometimes a tax return is lost in the mail, or you did not apply enough postage.

Did you ask the post office clerk to weigh it for you ?

See this  https://www.irs.gov/refunds