This entry on your W-2 does not need to be entered. According to the IRS W-2 Instructions for Box 14:
"You also may use this box for any other information that you want to
give to your
employee. Label each item. Examples include state disability
insurance taxes withheld, union dues, uniform payments, health
insurance premiums deducted, nontaxable income, educational
assistance payments, or a minister's parsonage allowance and utilities.
In addition, you may enter the following contributions to a
pension plan: (a) non-elective employer contributions made on behalf
of an employee, (b) voluntary after-tax contributions (but
not designated Roth contributions) that are deducted from an employee's
pay, (c) required employee contributions, and (d) employer
matching contributions."
It's a Catch All box for items that need to be disclosed, but not necessarily entered. In this case it's for Washington State Industrial Insurance. Employers are required by Washington State law to carry industrial
insurance (also known as workers’ compensation) for employees. In
return, the employer ordinarily cannot be sued for damages if a
work-related injury or illness occurs.
