I am sorry you are having this trouble, I am not sure why you cannot correct the AGI. I don't work for TurboTax but if you cannot get your return e-filed you might want to contact TurboTax support for help.
Get expert assistance by calling us at 1-800-4-INTUIT (1-800-446-8848). In addition, the TurboTax support page provides other resource links and help tools.
https://support.turbotax.intuit.com/contact/
