USCIS response to eRequest not received

You could schedule an InfoPass or speak to your company attorney for the best options to follow up.

TPS to f1 status

By regulation, a TPS holder is considered to be maintaining nonimmigrant status for purposes of a change of status, however, to be eligible for F-1...

What would the admit until date be at the port of entry be for H1B applicant? What would the admit date be for the H4 dependent?

You should always carry your most recent extension approval to be admitted for the maximum duration.

Working for a government agency

Most likely no. A sponsorship is required for most work visas.

F2 visa or B2?

If you are not still holdiong the F-1 visa, you couild not seek an F-2 visa for your spouse.

If you receive an RFE, you should make an appointemnt with an attorney to discuss what you will need to successfully respond to the RFE.

USCIS can reject any filing if the incorrect filing fee was submitted. Consult with an attorney.

This would depend on whether the applicant meets the strict criteria for EB-1 classification under the regulations.

Why Visa is still not issued after submitting additional documents to Immigrant Visa Unit?

It may easily take 3-4 weeks after submission for the consul to make a decision.

When applying for citizenship, do you also need to provide identification such as SSN of your adult sons/daughters?

If your parents are in fact seeking Naturalization, the attorney should not need your SSN.