RCW 41.50.230: Employer reports to department.

On or before a date specified by the department in each month every employer shall file a report with the department on a form provided, stating the name of the employer and with respect to each employee who is a member or who is required to become a member of the Washington state teachers' retirement system: (1) The full name, (2) the earnable compensation paid, (3) the employee's contribution to the retirement system, and (4) other information as the department shall require.