What-If form 2024 Balance Due different $ than tax return

[Dawn_Robertson]

Love the What-If form functionality.  Used it to calculate prepaid tax for 2025.  TurboTax What-If first column line 72 balance due is $315, whereas the Federal Tax due at the top of my 2024 return is $449.  Since Turbo Tax imported the 2024 return into the What-If form why is the balance due amount different?

[IsabellaG]

On the What-if Worksheet, if you click on the number on Line 72, a little magnifying glass will appear that will take you to the source of the number. In my case, the number was lower than the Federal Tax Due on my test return due to penalties.