Tax Year Prior to 2020: When do i report irs interest paid to me by the IRS. the refund included interest for TY 2013, the check was cut by the IRS in 2016, but the check was not received by me until 2017 ?

Since it was paid in 2016, the IRS will expect it on your 2016 tax return.  You report it in the same area as regular interest income.   See the instructions below as it goes in the same area as bank interest.  For the bank name, you can write US Department of Treasury.

What if I didn't get a 1099-INT from my bank?

https://ttlc.intuit.com/replies/4774384