What do you do when your mother says you cant attend the Kingdom Hall anymore?

If you are under the legal age of concent you obey her. When you are over 18 you can take steps to go to the Kingdom hall.

If She has no objection you can consult Jehovah's Witnesses online site (see RELATED LINKS below) and follow the weekly reading program by downloading the material that will be studied at the Kingdom Hall each week.

You can also ask her for permission for a home bible study with a Jehovah's Witness minister duly supervised by herself or an adult of her approval.