under IRC 663(b)(2) the distributions needed to be made within 66 days of the end of the year. this election applies to complex trusts and estates. distributions after 65 days don't count as to distributing out current year taxable income
see this link
however, if the trust terminated on or before it's year-end then this rule does not apply
https://blog.skodaminotti.com/every-fiduciary-know-65-day-rule/
