Can the Sch J be used for any number of years consecutively? I used last year(2012), don't need to use this year, but maybe next, so the numbers are already in and I wouldn't have to find and input them again if I could leave the J in this year. 2013 there is no tax liab because of child tax credit, so putting in any number doesn't reduce the liab less than 0. Does anyone just leave it in for the sake of not redoing when needed?