You are correct. The sibling of a US Citizen can not 'ride' on the papers of the parent(s). Talk to an attorney about options.

I once tried filing with CIS once and it didn't succeed. CIS required the person to go through state court for a name change.

Options to extend I-94 for my H4 dependent?

My colleagues are correct ... form I-539 is the answer.

What is the best timing and advice for USCIS green card petition?

Although it shouldn't be an issue ... considering your not-so-normal-timing ... it would be best to use an attorney.

B2 visa extension related questions

Q: 1. My I-94 last day is supposed to be end of April 2020 and now with B2 extension, what is the current last day of my stay? A: If you filed...

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Yes, you can get married. BUT ... talk to an attorney if you 2 have a long-standing relationship ... especially if your future partner has been...

I had a B-1 visa for last 5 years

Are you sure you have a B-1 ... BUSINESS visa and not a B-1/B-2 'combo' visa?

Can I be forced to live with my parents?

This doesn't appear to be an immigration question.

How long can someone on H1b visa work outside of the USA, I am stuck in the UK and there are no visa stamping dates available?

There is no limit. If you are in your home country, you are NOT working on H-1B and should not be on the US payroll. Talk to the company's...

If she had an EAD ... I don't see any problems.