Which penalty are you asking about? There are several different ones. The estimated tax penalty on line 38?
If you do not pay enough tax, you may have to pay a penalty for underpayment of estimated tax. Even if you are getting a refund you can still owe a penalty for not paying in evenly during the year. Generally, most taxpayers will avoid this penalty if they owe less than $1,000 in tax after subtracting their withholdings and credits, or if they paid at least 90% of the tax for the current year, or 100% of the tax shown on the return for the prior year, whichever is smaller. It is included in your tax due or reduces your refund.
I would fill out the 2210 by hand for 2020 to see how it works and if you could have reduced the penalty on 1040 line 38. Did you go through the 2210 section when you prepared your return?
If you have the desktop program you can switch to Forms Mode (click forms in the upper right (left for Mac)) and open the 2210 form. If the 2210 doesn't show up in the left column, click on Open Forms at the top of the left column. Type 2210 in the search box and open the 2210 form. Check box C to let the IRS calculate it.
Form 2210 https://www.irs.gov/pub/irs-pdf/f2210.pdf
Instructions https://www.irs.gov/pub/irs-pdf/i2210.pdf
