A really useful enhancement would be periodic edits that compare current year's input to prior years & send a warning box if basic info changes. Example - husband, who works for Any Retail Co. & wife, who works for Common Office Co. file jointly & have reported W-2 data for their respective companies in Turbo Tax for 3 years. While inputting current year's W-2 data, husband accidentally switches the radio button for Common Office Co. to himself. A box saying "this was wife's last year, are you sure?" would be extremely helpful, as checks toward the end don't indicate that the joint return doesn't include income for the wife.
As a repeat costumer, I appreciate how quick and relatively painless Turbo Tax is to use. However, I still had to go over the city tax portion several times before it was calculated correctly. I will once again use Turbo Tax next year.
I have used Turbo Tax for several years now & each year improvements have been made to make to make the experience of doing my tax returns simple & almost enjoyable.
The best part is E-Filing my tax returns. It's simple & efficient.