Turtle or tortoise what is it?

Recently found a turtle, probably a box but I it could be a tortoise I guess. A friend who has a grandmother who raises turtles says we should do things differently than we are doing. Told us we should turn off the heat lamp and put her into hibernation. After reading numerous sites I am even more unsure with what we are doing. Should she hibernate or not. Live in an Apt. have a rubbermaid containter large that she is in during the night but let her roam the patio and planter area during the day. Feed her fruits and vegetablesl 2 times per day and sprinkle calcium on the food 2 times per week. Has fresh water daily available and I also offer some pellets from the pet store. Has a hooked type beak. LOVE HER to PIECES. Am afraid I might let her DIE if she hibernates. She looks quite young. Came walking thru our carport during the summer months and she was about the side of the palm of your hand feet extended. Now has grown as her shell is about the size of your hand. We call her BLOSSOM. As she is thriving. Figure she is a female due to her shape underside flat and eyes bronze.