This Webinar is open to industry tax professional from COST Member Companies only. 


  • Tuesday, May 4
    11:00 a.m. – 1:00 p.m.
    3:00 p.m. – 5:00 p.m.

  • Friday, May7
    11:00 a.m. – 1:00 p.m.
    3:00 p.m. – 5:00 p.m.

Above times are EST.

This Webinar is open to COST Industry Members only and is ideal for multistate tax professionals, with various levels of experience in state income taxes.

The webinar will be presented on the Zoom platform. If your corporate firewall restricts the use of Zoom, you may join by personal device or audio. Additionally, this webinar will be conducted live with no recording made available afterwards.

Registration Fees

COST Members - $75

NOTE: There will be no charge for those also registered for the State Income Tax Webinar.

Cancellation Policy 

For more information regarding COST’s complaint and refund policies, please email Karen Galdamez.  

For More Information:

Please contact Karen Galdamez, COST, 122 C Street, NW, Suite 330, Washington, DC 20001, fax: 202.484.5229, e-mail: