A toilet that is leaking from the bottom of the tank probably needs a new toilet to bowl gasket or toilet tank bolts and seals. If there is a leak between the toilet tank and bowl when the toilet is flushed, that usually indicates that the seal between the toilet tank and bowl has failed.
This video will shows how to replace the tank to bowl seal and how to replace the toilet tank bolts. It's a good idea to install both a new tank to bowl gasket and new tank bolts/gaskets at the same time.
Know How Now video you might find helpful: How to Remove Stuck Toilet Tank Bolts: https://youtu.be/Cy_iOelaMHM
Check out my other toilet repair videos, bookmark this channel by subscribing, it’s free! https://www.youtube.com/channel/UCUsfNTwfDV3Ry_CFHJ9BeKA
Disclaimer: Due to factors beyond the control of Know How Now, I cannot guarantee against improper use or unauthorized modifications of this information. Know How Now assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. Use this information at your own risk. Know How Now recommends safe practices when working and or with tools seen or implied in this video. Due to factors beyond the control of Know How Now, no information contained in this video shall create any expressed or implied warranty or guarantee of any particular result. Any injury, damage, or loss that may result from improper use of these tools, equipment, or from the information contained in this video is the sole responsibility of the user and not Know How Now.