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Your 972CG deadline, calculated.
Enter the date printed on your Notice 972CG. The calculator adds the 45-day response window and shows where you stand. Miss it and the IRS assesses the proposed penalty in full.
Find it near the top of the notice, next to the notice number. Format: YYYY-MM-DD.
Basis: IRM 4.19.25.7.6 — Notice 972CG gives 45 days (60 for overseas filers) from the notice date to respond before the penalty is assessed (IRS.gov). The IRS can grant one extension (Letter 1948-C, up to 90 days from the notice date). The date printed on your notice controls.
Does the pack fit your situation?
Five questions. About a minute. Your answers never leave this page.
What happens next.
If the pack fits, the paid builder recomputes your penalty tier-by-tier, walks you through the reasonable-cause two-prong test, and assembles your written response — $129 one-time.