This product is hot garbage.
There's a lot of aspects of the product's design that evidence it is a creaky pile of technical debt that is kept alive by heavy lobbying (all of the tax-prep software companies try to basically prevent the IRS from introducing their own free solution.) I've concluded that I will never be filing with TurboTax again.
It's too expensive to be so unreliable. Next year I'm finding a different solution. Despite having numerous schedules and carryover forms that are saved from preceding tax years, I am going to bite the bullet and manually transfer them over to a new product.
Sayonara, dudes.
