If youre in California, Spidell is great for CE's. Im not a "member" of anything though,

What is your question, really? Are you looking for Continuing Education, or a plaque to hang on the wall?

How about NSTP?

You didn't mention NAEA, which would really be a great club to be a member of. 

One doesn't 'join' Spidell.  You purchase their various CPE offerings, and/or subscribe to their newletters, etc.

NATP is a membership; you have access to various CPE offerings (usually at a discount, sometimes free) as well as some other perks (discount on The Tax Book);  and you also get to ask research questions (the number depends on the level of your membership).  I have yet had them give a definitive answer that was at all useful.

Thanks, I want to understand A to Z of S-Corp 

Look at https://learning.cpaacademy.org/search_webinar?search_box=s+corp&field_of_study=&professional_design...

They have a good number of courses for FREE or reasonably priced. I see S-Corp offerings that might fit yor bill.

The Tax Book ( and probably QuickFinder) business edition has a complete  walk-you-thru example of an S-Corp tax return reporting.  It may not cover ALL possibilities, but it is a great place to learn the basics.

Thanks @abctax55. I would like to have a book for 1120-S completely. Most of these tax books have some pages do not have 1120-S and case study lonely.