I agree with the above positions. Immediate relative of USC, EB1 and EB2 excellent chance of PERM waiver

Unless, you are billionaire, I doubt unintentionally missing 1 year tax filing, per se, justifies denial for GMC.

You will be fine-1 surname is common in the US, as opposed to In Latin America where 2 surnames are common. This cultural difference is not a problem.

You have a confusing and contradicting question. It is possible to be a USC and LPR. Feel free to rewrite and resubmit your question.

Your child's name may be added later in the process. You did not provide more information about your case for a specific answer.

Additionally, both the I693 must be returned in separate envelopes with an USPS service.

Both USCIS and DOS passport office are aware of your case. Disregard that question does not apply to you.

No problem. I have transferred your question to tax section.

The I-20 is issued by a U.S. government-approved educational institution certifying that a student has been admitted to a full-time study program...

Sending a withdrawal letter to USCIS is best. The method preserves your good faith and respect for the process.