Thank you!
I might be overthinking but just one more angle to consider as Im worrying if there will be questions during my interview. the inadvertent registration occurred before my LPR status. The county cancelled it by themselves. Later when I applied for LPR I had no recollection of this and the 485 form never asked this specific question so I never bothered much. Now for N400, even though I have proof I affirmatively said NO to the usc question, would it be an issue for LPR status because the whole thing occurred prior to that and since I didnt actively go cancel it for years. Would this jeopardize LPR status itself? Should I be worried and how to respond to questions like why didnt you mention this on 485 etc. I really appreciate your thoughts on this. Thanks.