No big deal.
The technician who changed your oil forgot to reset the maintenance light.
You could look it up in your owners manual to see how to reset the light yourself. OR stop by the shop that changed the oil in your Camry and I'm sure they would be more then happy to reset the light for you.
〉 Answered on Jun 16th, 2015 by Amy Mattinat, Owner and Author at Auto Craftsmen Ltd