My 2016 tax withholding was over 100% of 2015 tax liability, per the safe-harbor requirement; how do I enter the 2015 tax liability to avoid 2016 underpayment penalty?

[Coleen3 · Accepted solution]

To enter underpayment penalty information in TurboTax online program, go to:

1.  Sign into your account and select Take me to my return

2.  Select tab from the top, Federal Taxes / Other Tax Situations

3.  Scroll down to Additional Tax Payment, select Underpayment Penalties and Start