Can a green card holder sponsor relatives?

I think you are using the word 'sponsor' incorrectly. Are you talking about filing an affidavit of support because a relative of your aunt filed...

How can I get my PERM Case Status number?

No, you as the employee/beneficiary, can not, and should not be in touch with the department of labor. The good news is that there is no 'case...

Will my company need to file for a H-1B amendment?

They need to hire an attorney .. it is improper for the employee to be involved with the LCA. The quick answer is 'yes' they need to file an...

Maintaining status after I-485 filing?

What do you mean 'based on LPR'? Are you saying that you are married to an LPR and that he/she filed a form I-130 CONCURRENTLY with you filing...

Changing country of birth after I-140 approved?

This will be a 'mess'. You need to hire an attorney.

What affidavit form do i need?

NONE ... you should never submit an affidavit of support, unless specifically requested by the Consular Officer. If one is requested, the form...

What does my having a divorce attorney have to do with my husband immigration attorney for removal of condition process?

Once people have attorneys in a contested matter, they are not allowed to talk directly with the 'opposing parties'.

Yes, you are subject. You have been reading the wrong web pages ... you should read the DOS, not USCIS pages. The US Consul in Montreal will...

N-600, Supporting documents - For our daughter, already got US passport , should we enclose the copy of LPR with other document?

Yes, go ahead and send copies of both documents. PS You are wise to file for the N-600 ... too many people don't do that ... trying to save money.

Regarding traveling to the USA & re-entering to Canada.

This is a US law-only website. Go to www.ailalawyer.com and search for an attorney with a Canadian license.