You need the approval notice to apply.

You need to talk to a immigration attorney. You'll have to provide more details to see if you qualify under AC21.

I agree with my colleagues. Keep documentary evidence to show the reason you quit your employment.

TN might get denied because of the pending I-130. I-130 should remain unaffected.

https://www.uscis.gov/policy-manual/volume-8-part-b-chapter-4 There is a chart that might help her determine if she can use the medical exam. It...

You can. H4 EAD allows for unrestricted employment.

I agree with colleagues above. I recommend talking to an immigration attorney to see what documentation you may need to apply.

You might want to see what all options are available for her by talking to an immigration attorney. Your girlfriend can petition her sister but...

You may travel with a receipt notice abd the expired green card. It is recommended to travel up to 6 months at a time.

When you get divorced, you will not be eligible for 3 years timeline. You will need to wait for 5 years (since the date you received your green...