Do a mistakes on the employments and residencies date will affect my N400

You can correct any mistakes at the interview. Consider hiring an experienced immigration attorney to attend the interview with you.

You can only on H4 is your spouse has an approved I-140. Consider privately speaking with an experienced immigration attorney.

Can I stay outside USA after filing Greencard in EB2?

Yes you can remain abroad while its pending

Good morning am I able to sue a nail salon for an injury called Cellulitis that occurred in October 2018?

Possibly. If you can prove damages.

Will a minor speeding violation caught on Camera DC show up on my residence state DMV record ?

The answer to all your questions is No.

As the immigrant, you are the beneficiary. You shouldn't use your real name on social media. Also, you should highly consider privately consulting...

I have applied a h1b in 2018, before I enter the country, my company shuts down.I have never entered the US with this h1b

I agree with the previous answers. You cannot use the H1 b visa if the company has shut down.

I agree with the previous answer. Your A2 visa can only be used to work for the government entity for which you were issued the visa. You also...

You should have the attorney representing you write a letter to USCIS.

green card holder applying I130 for Syrian Wife and Kids.

You will need a travel ban waiver for any cases from Syria.