After approval for LPR, you may sponsor your spouse for an immigrant visa.

Updating and editing are allowed during the IV interview.

It is OK to answer to answer "yes" that a SS card is requested.

The fact of your case appears to be contractual and may not qualify for U visa.

USCIS may or never send you the acknowledgement letter.

Your generalized question may be amenable to a reasonable answer with a specific immigration issue or question.

You are inquiring about two applications simultaneously. That way not useful and confusing. The I751 must be adjudicated before N400. Therefore,...

If you decide to file online, every supporting documents, including taxes must be uploaded in its entirety.

Your case as well as other cases are adjudicated on their merits. It is best to work with an experienced immigration and criminal defense attorneys.

You need a driver's license, or a sate issued photo identification to fly domestically. USCIS issued EAD is an employment document.