Quick question, I had recently changed my hto water tank to vacation and tried to put it back but I'm not getting nay hot water, I was just wondering if I had to re-light the pilot?

Piliot does not shut off in vacation mode, takes 2-4 hours to really get full hot water. If you still aren't getting hot water open the wind door to the gas valve and look for the pilot. It could have blown out on its own.