Sorry no one can call you from this public user forum. If your 2021 return rejects using the 2020 original AGI then enter 0 for the AGI to efile. If that doesn't work you will have to mail this year.
Did you efile 2020? Was it accepted? You should not have amended until the first return was done processing and you get the first refund. When you log into your account you should also see the status and if it was Accepted or Rejected, Started, Printed, Ready to Mail, etc. what does it say?
Then when you efile you get back 2 emails. The first email only confirms the transmission. The second email says if the IRS (or state) Accepte.d or Rejected your efile. Check back though your emails if you have them.
How to contact Turbo Tax
https://ttlc.intuit.com/community/using-turbotax/help/how-do-i-contact-turbotax/00/26991
What is the Turbo Tax phone number
https://ttlc.intuit.com/community/using-turbotax/help/what-is-the-turbotax-phone-number/00/25632
