Lat year I used TaxAct software to report my tax for the year 2014. At the final stage, the software asked me whether I would estimate the next year tax and pay it in advance. So I clicked yes and I have payed 4 times to IRS in the year 2015.
Therefore I get the tax form 1040 from the drawer and look at it. But I found line 77 is empty.
Do I misunderstand the question?