i have a 2011 Camry LE that is leaking on drivers side under floor mat and the back on the drivers side. I took it the Toyota dealership and the recommended i needed a new windshield, it still leaks

Your door drains may be plugged. Also check the door seals and weather strips.

Does this vehicle have a Sun/Moon roof?

If you have a sun roof or anything like that your drains are clogged. Iam a girl and I'm telling you it will only take a sec to fix open ur sunroof or what have you and get a straw and locate your drains in the corners four corners of your sunroof or moonroof you put it in the hole and blow and all of them and then take a cup of water and pour it down there to see if it's draining properly it should be if not get an air compressor and blow it in there if you blow it in there with the air compressor it'll unclog that and then you can pour the water down to make sure that it's draining and it should be draining by then it's that simple

did u check the weather stripping if its torn or old it can sometimes deteriorate and let gaps and leaks in