The due date for many tax-exempt and charitable organizations is the 15th day of the 5th month after the end of the accounting year. For an organization with a December 31 year-end, that’s May 15.

Plus: What’s open at the IRS, the fight over premium tax credits, guidance on OBBBA, Social Security increases, digital taxes and tariffs, Section 179 expenses and more.

Many not-for-profit organizations dread the unrelated business income tax (UBIT) because it can be a challenge to sort out when a not-for-profit’s activities are subject to the tax and when they are ...