COST Membership

2016 COST Calendar

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

COST Calendar

Use our COST Calendar to find events in your area!

forums

The COST Forums are a member-only online information networking system tailored to meet the information and communication needs of corporate state tax professionals in an easy, at your finger tips manner.  Forums provide an opportunity for members to share and discuss discrete state tax issues interactively online.