As mentioned, GLAARG and others does them online. However I'd like to throw out that amateur exams are held all over the place, quite often. These are typically friendly events and is a good way to meet people that have been in the hobby for a long time. Typically, your local VE team is part of a radio club that can tell get you lots of good getting started tips, especially if it pertains to local activity.

https://www.laurelvec.com/?pg=exams (All Laurel VE sessions are free and processed next business days)

http://www.arrl.org/find-an-amateur-radio-license-exam-sessi...