How do I properly perform a toilet gasket replacement?

To properly perform a toilet gasket replacement, first turn off the water supply to the toilet and flush to empty the tank. Remove the toilet by unscrewing the bolts at the base and lifting it off. Remove the old gasket and clean the area. Place the new gasket on the flange and reattach the toilet. Tighten the bolts and turn the water supply back on. Check for leaks and make any necessary adjustments.