COST Membership

COST Staff

Meet the COST staff and find out what they can do for you!

2016 COST Calendar

Start planning now - Check out the dates and locations of COST's 2016 National Programs.

state tax library

The State Tax Library is intended to serve as a thorough state tax resource.  The library includes legislative testimony, regulatory comments, studies, amicus, Practitioner Connection submissions, as well as a listing of significant historical state tax cases.