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You do not have to do anything.

The current rule is that one needs to have either worked for the initial sponsor or have a visa approved based on that H1 and have the visa stamped in the passport.

She can reapply for a tourist visa. COVID may be a helpful reason for the delay in leaving.

You would need to attach a letter from the Hospital to the application for extension with specifics as to why the person needs to stay for a longer period. You may also like to let a lawyer guide you in the matter.

You should discuss the matter with a Lawyer as a matter of abundant caution. You do not want them to question motivation. On the other hand, if she was working here and staying here for some time, it would seem logical. Yes, If you get married, you can use the country of birth for her to expedite your I-140.

1. It would seem the issuance of an I94 is proof of legal status and backdating is not necessary or possible. 2. They are legal to stay and are not subject to any ban.

You can stay till 04/15. The visa lets you enter. The I94 lets you stay.

Look at the latest Visa Bulletin at travel.state.gov. It is about 15 years.

You are now in H4 status. Inform your employer about the matter. Use the EAD as work authorization.

Call your ASC and ask them if you can come over sooner.

Your details will be visible to the POE Officer at entry. You need to speak to a lawyer about your situation before taking any steps.

Your details are not really relevant. He will get the appropriate name on the passport.

You should move on. Frame the RFE as a momento if you want.

Yes. You are eligible to have a sponsor file a fresh H1 petition from April,1 onwards

Become a US Citizen and sponsor her for the GC.