I'm working through a TurboTax dry run. I'm going to owe a lot, but that's by design. Income was up this year, so I paid in just enough to avoid penalties, and kept the balance in savings account earning interest.
Interestingly, I thought I paid enough estimated taxes to avoid a penalty... I planned it that way through Tax Act, but when I run my numbers through Tax Act this this year, it says I have a penalty. I'll be putting the numbers through Turbo Tax tonight or this week.