Where may I find information on what counts toward the 20 hours, website link etc.?

You can find information for the Tennessee Court Reporters Association (TNCRA) here  and you can find information on the National Court Reporters Association (NCRA) here. In short, any program or activity that a national or state association sponsors or approves will also be accepted by TBCR as well as additional program outlined in Rule 0455-01-06-.02