@ JDNICHOLSON
I assume you efiled your Federal return OK. Does Virginia want your 2018 Federal AGI or your 2018 state AGI?
Did you try to seek help from the Virginia Tax agency to see if they can tell why your 2018 AGI is rejecting? Maybe they can help you troubleshoot or tell you a way to check what they show for it on their end. Here's their contact info:
https://www.tax.virginia.gov/contact-us
Or before giving up, you might try to efile the state return with a 2018 AGI of 0 just in case that works. I know for a Federal return that will work if the 2018 Federal return was filed real late in the year (November or later). And I've seen it work before apparently for no obvious reason. It can't hurt to try.
