How do I turn off the flash for the canon

First of all, the flash can not be turned off in "Auto" mode. You can turn it off in any mode other than Auto. Would recommend Program "P" mode, which is very similar to Auto, but allows you to modify certain minor items such as flash and white balance.

Rotate your mode dial to "P", then press the button on the back with the "lightning bolt" icon. Press until the lightning bolt with a slash shows up on your LCD screen. The flash is now turned off in Program mode. Try taking a picture.

Remember, if in low light conditions you'll need to keep the camera extra steady without flash to get a clear picture. Recommend placing the camera on a table or chair (or even better, use a tripod), then using its autotimer to snap the picture.