What is the name of your state (only U.S. law)? New York
My father needs to file Form 1040X, Amended U.S. Individual Income Tax Return for tax year 2013 and 2012.
For tax year 2013 he owes $6,000, and for tax year 2012 he overpaid $4,000, so he only owes the IRS $2,000 net.
He would like to...