What is being asked? It it your 2018 AGI that you cannot find? That is required to e-file reguardless of where you file - the 2018 AGI is an IRS e-file requirement.
See this TurboTax FAQ on how to find your AGI
https://ttlc.intuit.com/replies/3301618
If you filed late last year there is a good chance that the 2018 AGI never was entered into the e-file database. Try using 0 (zero) for the AGI.
If you filed an amended return use the AGI on the first filed tax return.
If it continues to reject then the AGI in the IRS database might be in error. Mail filing is the only option.
**Disclaimer: This post is for discussion purposes only and is NOT tax advice. The author takes no responsibility for the accuracy of any information in this post.**
