Evap Leak (LARGE)
 

You've all seen it P0455, its not the cap, i've tried that, bought a new one, told them to reset it, it went away and came back within a few hours (i've heard the gas cap is from the evap leak (small))

So, I was told the evap hose could have been knocked loose or have cracks, so... where exactly is the evap hose to look for a knocked loose hose or a crack...? specifically if possible, I only have 1 jack, and no jackstands as I recently got the car, so where do I start?

if not possible with what I have, I will get more stands, or should I just take it to get it checked out?