If you used Turbo Tax last year you should start a brand new account for yourself and not transfer from last year. You can not remove a spouse or switch the order of names.
Online is only good for 1 return. But you can use the same email address for 5 accounts. How to start another return in the Online version
Start a new account. Removing a spouse is not recommended
Getting Divorced article
Video tips for Divorced couples
And see what AGI to use