Can my mother fill the non immigrant form that she has a daughter?

It may or may not be a problem depending on whether they think she is coming to stay instead of visit the US. She must tell the truth in any...

Ask the attorney to correct it since it is their petition. I don't think it will cause a delay, if the case is approved, you will be able to...

How long is PERM labor certification for EB2 supposed to take?

In Seattle, it is taking about 6-8 months for PERM if you have to advertise the position.

We don't know. Lying on an application is never a good idea. Disclose the denial.

How to get my spouse and my stepchildren to America

You can sponsor them by filing I130 for them. Good idea to consult with an attorney before filing anything to make sure each person is eligible etc.

Applying for a second waiver based on no objection.

Yes, you could file another waiver. You would need to maintain your status some other way, a waiver application pending does not protect your status.

do you mean you indicated you were single on your DS 160, you were issued an F1 visa, you entered on that F1 visa, and now your wife is going to...

Yes, tell your employer, they will want to update their I-9 records. As a courtesy, it is the proper thing to do as well. You no longer need the...

Marks on observation page

No clue about those brackets, its possible it could mean something, but what, I have no idea. The officer likely made notes about the conversation...

I need help

Always tell the truth, if you don't and it is discovered, then you will have issues with fraud. If you feel disclosing this will complicate your...