As few folks at the bottom of this thread stated, bunch of data here is obsolete and doesn't apply for Tax Year 2021. For this year do the following in TT Home and Business to get make it pick up the amount you paid with the federal extension:
Switch to Form View, and identify Tax Payments in the left column (list of forms), or simply click on the "Open Form" at the top of the TT screen and enter Tax Payments.
Once the form opens, look for line 9 (applies for Tax Year 2021), and enter the amount you paid to IRS when you filed the extension Form 4868 in line 9 - 2021 Extensions in Federal column.
This will trigger math that will update line 20 Total Tax Payments for 2021 to increase by that amount
Also this number will trigger TT to generate Schedule 3 which didn't exist up until this point, and you can check that it shows in line 10 - Amount paid with request for extension to file , and Line 15 (Total amount)
Few other worksheets get updated as well.
In summary, 1040 also gets updated to show this amount you paid with extension in line 31 - Amount from Schedule 3, line 15, as well as line 32 gets updated - Total Other Payments and refundable Credits and line 33 (1040 Tax year 2021) - These are your total payments get updated (increased) by the amount you paid with your extension.
I hope this helped .
