Just one clarification please.
Federal - Postmarked 4/15 or earlier, send ONLY the 4868. I will not be sending ANY payment (because of the probate delays). The IRS will simply apply the penalty and interest up to the time the full tax return and payment are received on or before 10/15/24.
Wisconsin - Send them NOTHING by 4/15/24. When the money from my brother's estate is finally available in a few months, send the full Wisconsin return (as typical) along with full payment and a copy of the 4868.
(They really are just casually waiting without penalty when nothing was sent their way by 4/15!?)
