As moderator Brenda points out there are two ways to do this, I realized afterwards as well.
Either start a new fresh return with no imported data and select the option she mentions. If you import data data you can enter a $$$$ amount for the ex spouse that is above the basic personal amount and TurboTax will calculate appropriately. I think early on in the profile pages under Introduction, Contact Info, Additional Personal Information there is the question Are you Eligible to Claim the Spousal Amount? Select No there and that will eliminate the benefit.
Glad my post could help a fellow filer, good luck!
