Line 38 is your estimated penalty and is not due until you get the bill from the IRS. You can include the amount when you pay either through TurboTax, by check, or through the IRS website - - or wait for the bill. The amount on Line 37 is due by 04/15/21, but the penalty is not due until the date on the bill.
The penalty is calculated on Form 2210. Because Form 2210 is complicated, you can ignore line 38 and the IRS will figure the penalty and send you a bill. They won't charge you interest on the penalty if you pay by the date specified on the bill. And the form will not be ready in TurboTax until the end of the month, so if you want to not wait for the form, this is the option you would use so you can e-file now.
However, if you want a waiver of the penalty or you use the annualized income method to figure the penalty, you have to wait for the form to be finalized. @kayska
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"
