If you sold your personal residence and did not hold a mortgage AND the entire sale is excluded THEN unless you got a 1099-S from the closing company none of the sale needs to be on the return at all. So either you or the IRS is very confused ... so I highly recommend you talk to someone and get this sorted out ... this online public forum is not the right place to get answers on this matter.
I GOT A LETTER FROM THE IRS
(what the letters from the IRS mean)
https://ttlc.intuit.com/questions/3605673-i-got-a-letter-or-notice-from-the-irs
I AM BEING AUDITED
If you purchased Audit Defense:
https://ttlc.intuit.com/questions/2924451-i-bought-max-or-audit-defense-and-now-i-m-being-audited
AUDIT SUPPORT
If you did NOT purchase Audit Defense:
https://support.turbotax.intuit.com/irs-notice/audit-support/
