IRA contributions
Contributions to traditional IRAs and 401(k)s are excluded from taxable income on federal income tax returns. Taxpayers are limited, however, in how much they can contribute in any year, depending on how much they earn, their total income, and how old they are.
Further definitions for "IRA contributions" are available here.
More information on "IRA contributions" is available in the TPC Briefing Book.
From the IRS, more information on "IRA contributions" is available here.
From the Tax Encyclopedia, more information on "IRA contributions" is available here.