The faulty 1099-R shows $1,601.58 in boxes 1 & 2a.
TIAA’s letter explains that $124.59 of this is “estimated earnings” – i.e. what I would have earned on the $1,476.99 tardy distribution had I received it when I should have.
I believe I should report the $124.59 as taxable on my 1040. But where? It isn’t really an IRA distribution or annuity payment, is it?
In which case, on the Form 4852 I would give the $1,476.99 a distribution code of “Q”, but no code for the $124.59.