Scheduling interview thru ustraveldocs website

created a profile in ustraveldocs site. It asks for petition expiration date. where can this be found? if it is the date written under case status in uscis site then we have a date in 2012, so is it ok to put a expired date?

our petition is valid but the expiration date in site is already over

Look at the approved 797. It will have the petition validity dates.