If you’re not so sure, just go with the mailing approach since it’s tried, tested and works. Don’t put yourself in a situation that might create problems you could have prevent. I understand it might look convenient and pretty cool, but it’s still new.

I saw a few people filing online and getting receipts. Planning to do online.

Online filing can be convenient because you get instant receipt confirmation and easier case tracking, but paper filing is still very common since I-485 packages often include medical exams, multiple forms, and extensive evidence. So it is not really that one method is universally better, it depends on the type of case and how comfortable the applicant or attorney is with the online system - Attorney Fernanda Hipskind (All information shared here is for general educational purposes only. It does not constitute legal advice or create an attorney - client relationship. Your situation may require fact-specific guidance. For personalized legal advice, please consult an immigration attorney directly.)