I am filing MFS and NOT in a community state so why am I being asked for MFS Fed AGI?

I am Married Filing Separately and do NOT live in a community state and my spouse and I have lived apart for the entire year. TurboTax produced an error "Information Worksheet: MFS fed AGI must be entered." What does this mean and where do I get this information? Is it asking for a combination of my and my spouse's income?

Thank you!