Where do I enter tax paid for a previous year?

[dsc4327]

I paid 2012 underpayment in 2015.  Where do I enter it on my 1040?

[xmasbaby0 · Accepted solution]

The money you paid to the IRS for a previous year’s federal tax return is not deductible, so you do not enter it anywhere on your 2015 return.  If you paid taxes due in 2015 to your state or local government, you can enter that by going to Deductions and Credits, “I’ll choose what I work on,” then scroll down to Estimates and Other Taxes Paid, then click start on Other Income Taxes.  You can enter the taxes you paid, but do not include any penalties or interest.