We own a house together and our USA residence hasn't changed. Maybe I'm stuck on the physical presence requirement implying we must be inside the USA for the three months before we file (early or not). But I feel better that I'm worried for nothing since we didn't move our residence, just will travel outside the USA during the 3 month window before we file. If I've got it wrong let me know, because I will be making travel plans based on the presumption that I can arrive inside the USA and file the n-400 without waiting 3 months.