If you have clogged your toilet, you can unclog it with a plunger. First, ensure the toilet bowl's water level is below the overflow tube. Next, turn off the water supply valve to avoid flooding the bathroom. Then, place the plunger over the drain hole and press down firmly on it. Make sure you push down on a tight seal around the drain hole. Repeat this process several times until the water starts to drain from the bowl. If this does not work, a plumber can remove the blockage without damaging your toilet bowl or drain line.