I-140 Correspondence

You will need to find a new employer in the same or similar position.

Can a person who overstayed a visa waiver in the US, travel to and enter another country, other than their own country?

3 and 10 bars of unlawful presence are barred from being re-admitted or re-entering the United States, but do not require return to one's home...

H1B petition in USCIS website shows revoked but I still work for same employer

first you must find out if there was an inadvertent withdrawal. Depending upon the reason your attorney can advise.

Employment portability under H1B

it may be possible if USCIS doesn't see the initial filing as fraudulent.

1) at least 6 months after GC; 2) if not imply would not work in one's field; 3) you may choose a marital petition and application; 4)...

L2 EAD Extension

Will an extension be filed or will consular processing be sought. The EAD will be extended for the period of L validity.

My fiancée has green card in process and he hold H1B visa in that case can dependent work

H4 may apply for EAD when the H1B spouse has an approved I-140 immigrant petition. H1B is not a better work authorization, but is a better status...

How do I prove that I have been continually present in the US for naturalization?

USCIS will look at your passport and check your I-94 record. Additional, evidence as may be required.

Can I file a petition for my sister and my fiance at the same time?

Yes, may file multiple petitions for whom you may have sufficient income for the I-864 affidavit of support when required.

Reappearing for interview with 221g in the first attempt With the same employer

While you may appear for another visa interview. The result is likely the same without appropriate documentation. You may explore with an attorney...