The tax shown is just the tax amount. The line for Interest on Underpayment of Estimated Tax has a blank amount. The All Forms version of the pdf does not show any form 2210 or worksheet for it. So, there was no evidence of a penalty (interest) on the 1040. When I, now, try to calculate the interest owed manually, I do get close to what I am being billed by the state. They are not asking for additional interest - it's only the interest I should have paid originally.
