Received Refund for Amended 2018 Tax Return in 2020

I had to file an amended 2018 tax return in 2020 to fix a double counting issue with our investments.  As a result I received a refund for our 2018 Federal and Sate Taxes in 2020. My question is 2 part:

 

First, do I need to include the amount I was refunded by the state of MN in the section for "State and Local Tax Refund" even though it was for a prior years tax return?  I received the refund in 2020 which was a combination of the refund I should have had plus money I had mistakenly paid in for my 2018 tax return.  I took the standard deduction on our 2018 taxes.

 

Secondly, I received a 1099-INT for the interest paid me by the federal Department of the Treasury but I did not receive one from the MN Department of Revenue.  Do I need to claim the interest paid me by MN Department of Revenue even thought I did not receive a 1099-INT from them?