OldUser

Yes it may be a problem. You were close to minimum and fell below the minimum. I'd start looking for plan B, e.g. joint sponsor.

RFE from IRS? That's unrelated to immigration. Are you sure you filed taxes correctly and disclosed all the income? Sometimes it's worth paying a good tax preparer to get taxes filed properly

You will need to file I-90 and this will likely be slow (months). Some lucky people get replacement fast, but it's not common. You can show DL and unrestricted SS card as @Ontarkie suggested. You can also get ADIT stamp (I-551) in passport / on card once you file I-90.

You need to update when you physically move into the new home!

That would be my advice. I know you don't have crimes, but divorce and long absense together already may create a bit of complication when adjudicating the case. At least the continuous residence won't be an issue if you want a little longer. When I-751 was approved, were you still married, in process of being divorced or divorced? Did you live with your ex at the time when I-751 was approved? Did you file jointly or with divorce waiver?

I think I noticed a trend for N-400 based on 3 year rule. People coming to the interview with thin folders get RFEs, while people who bring huge stacks of evidence don't get asked for anything. It's silly but I think bringing a lot of evidence weights on interviewer causing them to soften up.

Self delete

Is the US citizen petitioning you, a biological parent of your kids? That's the first thing to figure out. If they are biological children of US citizen, who lived in the US for over 5 years, then they may be US citizens already. Otherwise, US citizen may need to sponsor them with I-130 for each kid to get immigrant visa and GC.

It does happen. Nothing to worry about. Sometimes office gets busy and has to reschedule interviews. Monitor the mail. If you receive physical mail to attend, you may still want to do it to be 100% sure you won't miss the interview.

I hope you don't receive an RFE. Good luck and let us know how it goes.

I don't think you game overprepared. Maybe you weren't asked for anything because you had everything. Would you came with minimal stuff, I bet you would've been asked for more evidence.

Those are random numbers. You can roll a dice and get a more accurate prediction.

It's a good idea to always download the statements as they become available and not rely on bank's archives.

Enough not to get an RFE. You can do either monthly or quarterly. Do not submit partial statements either.

Those estimates are random meaningless numbers. You can safely ignore updates

Perhaps lease with both names, bank statements with both names etc would have helped to avoid RFE

Thanks for detailed experience. How much evidence of bonafide marriage did you submit with N-400?

Delete

If you were never married you can't provide anything. If your spouse was married and divorced before, they need to provide copies of divorce decrees. I'm sure forms ask about prior marriages and divorces. Providing evidence to back it up is not bloating package, it's avoiding RFE.

I understand the pain, but immigration is not a right, it's a privilege. At least waivers are offered. In many other jurisdictions people are asked to leave the country. UK for example doesn't even allow getting marrying in the UK on visitor visa or other visas other than special Marriage Visa.

Yes you should to prove you were free to marry your current spouse.

Might be an unpopular opinion, but I did not duplicate evidence for each form when I did my AOS with a lawyer. Everything was sent as one packet and as far as I remember, only two photos were sent. Approved, but that was few years ago.

Did RFE letter received by mail mention replying online? Just because you can doesn't mean you should. Most likely the instructions in RFE provided address to mail response to. Technically, USCIS doesn't have to take any response provided online if RFE instructions don't mention it. Add to that glitches in USCIS IT systems (duplicate A numbers, missing case statuses, etc etc) nobody can guarantee uploaded evidence won't be silently discarded / lost / agent won't have permission, desire or training to see it. Sometimes it is OK to follow the suggestions from members who've seen it all. I think @K1visaHopeful is coming from a good place. If I was paid $10 every time I see people's packets being rejected due to declined credit card payment, I'd get a Michelin star dinner for free. Yes, many times USCIS offers something, but it doesn't mean just because it's there it's a good idea to use. If online RFE reponse is lost and USCIS says you never sent it, how are you going to prove you submitted it? Do you get a confirmation email with some unique receipt number (like AR-11 online)? If not, I'd respond by certified mail / UPS / Fedex with proof of delivery. So that if USCIS claim they never got it, I could argue they received it.

Congratulations! Hopefully you won't have to do I-751. Right now it's even a longer journey of close to 2 years.

What about joint lease? Did you get her ID? Submitting copies of your and her IDs showing matching address can be helpful. Also, I hope you're submitting all pages for both banking and utility statements? And not just one of each, but all statements with both names since you added her name on them?