Underpayment tax penalty

[Anonymous]

I filed 2021 taxes using TurboTax form 1040.  I ended up owing $5,800 (line 37) and paid this amount in Feb 2022.  For line 38, I was given the option to either calculate the estimated tax penalty OR leave line 38 blank and the IRS would calculate the penalty and send me a tax bill.  I chose the 2nd option.  It has been 9 months and I have still not received a tax bill from the IRS.  I have logged on to the IRS.gov website which shows no tax due.  Is there something else that I need to do to pay this tax penalty?  I would like to have 2021 taxes all wrapped up before filing my 2022 tax return.

[RSUMan]

There are two main reasons you may not have an underpayment penalty: 

1.  your withholding and estimated tax payments in 2021 exceeded 100% of your 2020 liability or

2. you paid at least 90% of your tax due for 2021 through withholding and estimated tax payments.  

When you fall into one of these "Safe Harbors", there is no underpayment penalty imposed.