How do I actually talk to someone about a calculation error in my taxes due (tax liability - taxes paid =/= my tax due)? I'm not signing up for tax support for an error.

Check the actual tax return.  Is the tax due on 1040 line 37 wrong?  See if you have a penalty on line 38.  That adds to it.

Volvogirl is correct that the underpayment penalty gets added to the tax due in an out-of-sequence way.

 

What summary page are you referring to? Not a tax form, right?

 

What are the numbers that you think don't add up?

 

@VolvoGirl