This is more complicated than it first sounds, thanks to a relatively new thing called a "Payroll deduction IRA."
https://www.irs.gov/retirement-plans/plan-sponsor/payroll-deduction-ira
If you have a qualified workplace plan, such as a 401k or 403b, those plans are reported on your W-2. They are not IRAs (even though they are similar) and you do not report the contributions as IRA contribution. Only on your W-2.
The payroll deduction IRA is an arrangement where you open your own private IRA (possibly at a bank of your choosing, possibly at a bank selected by the employer). The employer takes after-tax payroll deductions and sends them to the bank for you. The employer is not allowed to take pre-tax deductions and the employer can't add matching funds. Essentially, the payroll deduction IRA is a way to save in your own private IRA but have your employer help you by taking a payroll deduction instead of giving you the money, which you might spend instead of saving. (My old employer offered a way to buy savings bonds from payroll deductions, or split my paycheck between a checking and a savings account. Basically the employer is helping you to save your own money.)
If you have a payroll deduction IRA, the deductions are not on your W-2 and you do need to report them to get the tax deduction.
