Massachusetts Commuter Deduction when EZ Pass not under your name

If you pay, you qualify. Page 22 of the  Instructions for line 15:

Line 15. Commuter Deduction A deduction is allowed for certain amounts paid by an individual for tolls paid for through an E-Z Pass account or all MBTA fares, not just weekly or monthly transit commuter passes, and includes RTA fares, bikeshare memberships, bike purchases (including e-bikes), bike improvements/ repair/storage, and fares on non-MBTA commuter boats that are owned, operated or contracted by a municipality or a public or quasi-public entity, agency or authority, not including amounts reimbursed or otherwise deductible. 

In the case of a single person or a married person filing a separate return or as head of household, this deduction applies only to the portion of such expended amount that exceeds $150, and the total amount deducted cannot exceed $750. In the case of a married couple filing a joint return, this deduction applies only to the portion of such amount expended by each individual that exceeds $150, and the total amount deducted cannot exceed $750 for each individual. Also, one spouse cannot transfer his or her excess deduction to the other spouse; separate worksheets must be completed to calculate the deduction. See TIR 06-14 for additional information.