I also spoke with an attorney, and also called one of the law firms (hykel law firm) to be exact. Called godoy law firm (they also posted article and they wanted 400$ for this). They checked with their attorneys and said that they are not aware ,and IRS is in better position to speak to it. But assuming we are in same boat ( green card), IRS is wants to collect tax from us like a US citizen, which is fine. This rule (if there is) is from USCIS, coz they would want us to file tax in correct status. And it seems that as per immigration attorneys, as long as we do it, we have declared ourselves in correct status.
