Form 8872 due dates - Quarterly reports

An organization must file its first report for the first quarter of the calendar year in which it accepts a contribution or makes an expenditure. Quarterly reports are due by the 15th day after the last day of each calendar quarter, except the year-end report which is due by January 31 of the following year. In addition, an organization may have to file a pre-election report, a post-general election report, or both.