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TRS webinar explains 1099‑R and W‑4P rules, mailing timeline and state withholding options
Summary
A TRS webinar on Feb. 24, 2025 explained federal taxation of TRS benefits, how Form 1099‑R reports taxable and non‑taxable portions, changes to the W‑4P withholding form, mailing timelines handled by the Illinois comptroller, and which states TRS can withhold state tax for.
A TRS staff member presenting the webinar said on Feb. 24, 2025, “Your TRS benefits will always be federally taxable,” and walked retirees through how Form 1099‑R and Form W‑4P affect federal withholding and certain state tax withholding.
The session explained why retirees receive a 1099‑R, how the Office of the Comptroller of the State of Illinois mails those forms, what boxes on the form mean, and how to use the W‑4P to change withholding. The presenter also summarized which states TRS can withhold for and provided practical timing and contact details for retirees who need help.
The webinar emphasized federal taxation as a baseline: TRS benefits are treated as federal retirement income because most TRS contributions while employed were made on a pretax basis. The presenter said after‑tax contributions — for example, payments for optional service credit or the 2.2 upgrade paid with after‑tax dollars — are tracked separately by TRS and returned to members as nontaxable amounts when paid back in retirement.
On Form 1099‑R, the presenter highlighted common boxes retirees will see: box 1…
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