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...
