The time it takes for the eggs to hatch depends on the temperature that you are incubating the eggs. If you want males, incubate at 88 degrees (takes roughly 35-38 days); for males and females, incubate at 85 degrees (takes about 42-45 days); and for females, incubate at 80 degrees, which can take up to 75 days, sometimes longer.
Make sure that the temperature doesn't fluctuate too much, because this can cause problems with the egg (deformities and even death). Also, make sure not to turn the eggs, as the embryo will attach to the top of the egg, and if the egg is turned, the embryo will drown. You can mark the top of the egg with a Sharpie or other felt-tipped pen to make sure that it stays the same way it was laid. Also, direct light on the eggs can hurt them as well, so try to keep them in a dark place, or keep the incubator window covered.