The due date for Form 990 is the 15th day of the 5th month after the end of the organization's taxable year (May 15th for calendar year organizations). However, if the 15th falls on a Saturday, Sunday or legal holiday, the actual due date is the next business day that is not a Saturday, Sunday or legal holiday. Because of system limitations, the effective date of revocation listed is the unadjusted due date, not taking into account Saturday, Sunday or legal holiday dates. Therefore, if the unadjusted due date fell on a Saturday, Sunday or legal holiday, the actual effective date of revocation is the next business day that is not a Saturday, Sunday or legal holiday. For example, May 15, 2010, fell on a Saturday so the actual due date for returns was May 17, 2010. Therefore, where the list states the effective date of revocation is May 15, 2010, the actual effective date of revocation is May 17, 2010.
