What is box 14A and 14B used for? Can I claim it on my taxes and additional contributions?

[DawnC0]

Employers can put just about anything in box 14; it's a catch-all for items that don't have their own dedicated box on the W-2.  You will need to ask your employer what these deductions (14a and 14b) are for if you are unsure.  

You can count the amounts in Box 14 of your W-2 if they are for a qualified retirement plan.  The amounts in Box 12 are already included and are not ''additional'' contributions. 

https://ttlc.intuit.com/questions/1900224-what-is-a-qualified-retirement-plan

https://www.irs.gov/retirement-plans/plan-participant-employee/retirement-topics-ira-contribution-li...