Spouse prior year AGI

I need help entering my spouse’s prior year AGI. 

We got married December 2025. I filed my taxes erroneously as single which I am now working on amending and filing as married jointly. The problem I’ve encountered is that when I get to information verification where it asks for prior year AGI, it’s only showing my name and don’t see an option to add my spouse’s. 

We’ve tried filing it with just my prior year AGI, as well as both of our AGI combined. Both got rejected with an error saying Spouse’s prior year AGI must have a value. 

We’ve called Turbo tax and talked to 3 people now but no luck so far. 

Would anybody else be able to help? 
we’re really trying not to file via mail so our next option would be to just file our amendment on a different software/company.