Desk Tools
Response Deadline Calculator
Enter the date printed on the notice. Deadlines falling on a weekend or federal holiday roll to the next business day (IRC §7503).
Common windows: 21 days (CP14), 30 days (CP2000, LT11/CP90 CDP), 60 days (CP11/CP12 math error), 90 days (Statutory Notice of Deficiency; 150 if outside U.S.).