Is 90 day rule applicable during physical presence period

usadesi

Registered Users (C)
Hi,

We have had GC for 12yrs now. We were away for 9yrs with an approved N470, to maintain continuity of residence. We have always traveled to the US, once in every < 12 months. We came back for good in Aug 2015. We will be finishing 30 months of physical presence in Feb 2018. I would like to know, if we have to wait till Feb 2018 to apply N-400 or can we apply 90 days prior, in Nov/Dec 2017?

Thanks,
 
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