About Jan 10, 2017 I received a surprise large disbursement/payment from a trust via check dated Dec 31, 2016. I assume the Schedule K-1 that I will eventually receive for tax year 2016 tax year will include it.
Despite what may be reported on forthcoming K-1, can I treat this as 2017 income as it was received/not available to me until after 2016?
If not, am I still allowed to make an estimated tax payment for 2016. My attempt at using the IRS inline payment appeared to only allow a 2017 tax year designation for estimated payments at this point. I thought I might be able to fill out a form 1040-ES for 2016 and send it in anyway. This would be to forestall any fees and penalties accruing.