But would there be any downside in filing the AR-11 now anyway ????
When I came back from overseas in 1999, I retired and forgot to fill out the AR-11 (previously, the company had done it).
After 9/11 the (then) INS/FBI was using lack of AR-11s as reasons for all sorts of severe action against individuals that they perceived to be security threats.
So, I went ahead and filed a few years late. No negative consequences and no impact on my N-400 application, namecheck or interview.
However, Had the question come up (which it did not), I could have replied that I was all up to date on my obligations.