RGTI_

Thank you @TBoneTX!! I think that's the case actually. I tried to find the instructions for that specific form and it only says to list current country of citizenship or nationality. It did not ask to list multiple/all citizenships in that field or anywhere else on the form. So, I think I should be good!

When I filed I-485, it asked for "citizenship" and I only listed my main one, assuming I just needed to list one, even though I had a 2nd one, that I haven't used for travel, visas, etc in many years.

When I started filling out N-400, I noticed that they ask for "citizenships" and after some research I learnt I needed to list both citizenships on I-485 as well. Will providing an explanation letter with the N-400 application be enough? Has anyone been in a similar situation?

Also, the country of my 2nd citizenship is under sanctions now, although it wasn't when I applied for greencard 5-6 years ago. Not sure if that makes a difference