If I request a 401k distribution today on 12/31/17 and it is processed on 1/2/2018 do I fill out a 1099r for 2017 or 2018 taxes?

[xmasbaby0 · Accepted solution]

*You* do not "fill out" a 1099R for yourself.  When you have a distribution from a retirement account, the financial institution that handles your retirement account issues the 1099R.  Since this is a Sunday, it is unlikely that you could get your distribution accomplished today, even if you request it online.   More likely it would be dated for the next business day--which will be in early 2018.  If the distribution is not posted until 2018, then you will not get a 1099R until January/late February of 2019; the distribution would go on your 2018 tax return which you file in 2019.

[fanfare]

Is this important whether it is 2017 or 2018? If so, you should have planned ahead.
It all depends on your FI processing rules, but you can't call them to find out the answer.

[Hal_Al]

You may want to call your financial institution, especially if they're big enough to have an 800 number. They may be processing transactions today ( but probably not).