You can't add it to your 2020 return. You will have to call the IRS to put a trace on it.
I have never been able to contact them, they just put me in a automatic service which tells nothing about tracing, just the status. Anyone knows a real number to contact someone directly regarding this issue. Thanks
You have to call GA and ask if they sent it yet. When did you file? If you efiled was the state return Accepted? Maybe it rejected or you didn't finish filing.
How to check your efile status
https://ttlc.intuit.com/turbotax-support/en-us/help-article/electronic-filing/check-e-file-status/L9XhHDPtD_US_en_US?uid=lvriwl8j
When you efile you get back 2 emails. The first email only confirms the transmission. The second email says if the IRS (or state) Accepted or Rejected your efile.
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 only the state can tell you when you will get your refund. After Turbo Tax transmits your return they are done with their part. Track State Refund
https://ttlc.intuit.com/community/refund-status/help/how-do-i-track-my-state-refund/00/25571