It doesn't have to be filed on December 31. That's just the date you'll look at when calculating whether the fund has met the 90% investment threshold. Check out IRS Form 8996 for more detail on how the fund's asset test is calculated/reported. Assuming your fund is a partnership, you'll file Form 8996 with the fund's annual tax return by March 16 (or September 15th, if you request an extension). Scott McIntosh, J.D. Opportunity Zone Consulting Group Mobile: 859-421-1899 www.ozconsultinggroup.com