NR4 from Canada

I have 3 NR4 from Canada and I am a US citizen.

My mother passed a few months back. I have 3 NR4, 1 with code 61 and 2 with code 40.

I'm a little confused on how I enter these. My understanding is that I enter them as mock 1099-R but is there a breakdown of what boxes I fill out on the 1099-R 

1. The NR4 forms have very little information, they have:
   • Box 16 - Gross income
   • Box 17 - Non-resident tax withheld
2. When doing the exchange rate do I do it based on todays currency exchange?
3. Where do I get the TIN or do I leave it blank? 
4. Do I have to fill out a separate form as well or will the 1099-R suffice?

Thank you