AP has two tasks that advance the year in AP settings that are ran as part of your year-end procedures.  AP - Tasks - Close 1099 Year and AP - Tasks Close Year.  First you should read year-end procedures found here:  https://us-kb.sage.com/portal/app/portlets/results/viewsolution.jsp?solutionid=222924950026219&page=1&position=8&q=year%20end

If you've advanced the year too far, see:  https://us-kb.sage.com/portal/app/portlets/results/viewsolution.jsp?solutionid=224924450058309&page=1&position=6&q=year%20end