A federal judge on July 30, 2019 overturned an IRS ruling, issued almost exactly a year ago, that allowed many nonprofits to stop disclosing their donors on their annual tax returns.
In Revenue Procedure 2018-38 (July 16, 2018), the IRS allowed social welfare organizations under section 501(c)(4), professional and trade associations under section 501(c)(6), and many other types of organizations required to file a Form 990 series return, to cease disclosing their large donors ($5,000 or more) on Schedule B of the Form 990. The major exceptions were section 501(c)(3) organizations and section 527 political organizations, both of which are subject to statutory requirements for donor disclosure that the IRS could not waive. Those IRS rules are described in more detail here.
Even though the names of donors disclosed on Schedule B of the Form 990 were not made available to the public, only to the IRS, many commentators viewed the new rules as facilitating “dark money” in politics. The state of Montana, joined by the state of New Jersey, brought a lawsuit alleging that the IRS could not simply waive the donor disclosure requirements, which were established by IRS regulation, without providing an opportunity for public comment in accordance with the Administrative Procedure Act.