Express 2500 Van Won't Start

I searched and read through most of the 'won't start' threads but did not see anything that applied to mine.

Car had no engine problems. I drove it around to do some deliveries. Stopped the Van. After about 10 minutes, I put the key back in and turned to start the car. Then I heard a small tick sound and did not see any power or start up warning lights. No start up sound and engine does not turn. I think it might be the fuse box but I don't know where it is or if it is something else. No power is going to the lights or any part of the van. Been like this the whole day.

Thanks for any advice for help.

Welcome to AF
Under hood and by emg brake and under seat is three good spots to find fuse boxes.
What year and engine?
Cutway or regular van?