If you are no longer married and you were filing as Married Filing Jointly, you will need to create a new TurboTax account since you are now Single. Clearing out a tax return that was filed as MFJ and is no longer filing with that status is very problematic.
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