Information reporting & withholding compliance — 1099, 1042-S and W-8/W-9
Articles

Notes from the reporting front line

Plain-English summaries of the changes that affect 1099 and 1042-S filers. For the full analysis behind any update, get in touch.

CP2100 Apr 6, 2026

Understand IRS CP2100 and CP2100A Notices

What a CP2100 or CP2100A notice means when the IRS flags a Form 1099 name and Tax Identification Number (TIN) mismatch — and the steps to resolve it before backup withholding is triggered.

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A change on this list affecting you?

From the IRIS transition to a fresh CP2100 notice, we can tell you what it means for your filings — and what to do next.