@kak
Please clarify. All contributions made by payroll deduction, whether your money or an employer contributions, are considered under tax law as "employer contributions." This is because you technically ask for a salary reduction, and the employer contributes that salary difference for you. All employer contributions (meaning employer plus employee through payroll) should be reported on the W-2 in box 12 with code W.
I read your question to mean that you contributed $2000 via payroll deduction, with $1500 as a salary reduction and $500 from the employer. If that is the case, your W-2 is wrong, and you need to contact your employer for a corrected W-2. And you should not try and file your return until you get the corrected W-2. If they refuse to provide a corrected W-2, you can file with a "substitute W-2" form, but this prevents you from e-filing and will require proof that you tried to resolve it with your employer first.
