Queryabout dependent visa extension n ead

The dependency status may be questioned if not living together.

Best to consult with an attorney for further guidance.

Affidavit Support for immigration lawyer?

It does not appear that she would qualify as cosignor.

Immigration?

What do you mean by paper marriage?

Yes you may apply for adjustment of status if intention was not to enter and remain permanently. Best to consult with an attorney for guidance.

You will need to include the I944 declaration for self sufficiency. Best to work with an attorney.

Yes this happens for some cases and is nothing to be concerned about. It should expedite the processing of your case.

Best to not remain outside of the US for more than half of the year for any given year to preserve your residency.

What is the exact amount to pay as a first applicant for change of status and work authorization?

If you paid for the $1225 filing fee for adjustment of status, you do not need to pay the I765 fee.

Yes you may submit all forms together at the same time given information provided. Best to consult with an attorney for guidance.