I failed to pay estimated taxes for 2018. If I use Turbo Tax again, will the program calculate interest and penalties I may owe?

[AnthonyC · Accepted solution]

Yes, TurboTax will calculate any underpayment penalty that you may owe on your 2018 return.  It will appear on Line 23 on Form 1040 this year.  

If you are asking because you don't want TurboTax to calculate this penalty, then you can go through the interview section for Underpayment Penalty and there is an option to remove the penalty and have the IRS calculate the penalty instead (they will send you a bill for it).