If you need to report or update your social security number or tax ID number please use this form.  

If you are an international student on the F-1 or J-1 visa status and do not have a SSN or ITIN, you do not have to fill out the W9-S or the form located above.

Tax Information

  • ECSI is the name of the vendor we use to process and report 1098-T information
  • 1098-T Electronic Notification Process:

To give consent to receive your notification electronically, log in to the SECURE website below using the given information:  If you need any help logging in, please contact ECSI's 1098-T hotline at 866-428-1098.

Website: ECSI

Read information, check the consent box, verify your email address and click the submit button.

ECSI contact information:  1-866-428-1098 or website (1R is CSU San Marcos school code)


CSUSM Tax Information Contact:
Marietta Kimball
Email: mkimball@csusm.edu
Phone: (760) 750-4492