What do I put on the employment history on I 485 if I was on a O1 as an actor for the last 6 years?

Did each "employer" pay you directly?

I have to legalize my country marriage certificate or any country marriage certificate is valid in USA ?

If your marriage is legal in your country; then it is legal in the U.S. You can always confirm this at the Embassy/Consulate.

Hello wht happens if someone ignores a call in Letter from homeland security

If one ignores a call-in letter, then Homeland Security will usually come looking for him/her. Also, a copy of the letter will be filed away for...

You need to do more research and be clear on the circumstances before you file for your dad. Consult with an experienced immigration attorney.

There is a name mismatch on the application vs, the passport, what do I do?

You will also need to present the document that legally changed her name from the name on the birth certificate.

I’m f2 visa can I buy Ferrari in USA ? And can I be able to apply for Green Card?

Yes, you can buy a Ferrari in the U.S. You can apply for a green card if you qualify.

For my brothers f4 visa, when I added his sons name I spelled it wrong, will there be an issue?

Not a major issue since the correct name appears on the birth certificate and passport. The error will be noticed and corrected at the interview.

Is the I-130 form in the USCIS website the correct one because i noticed it has an expiry date of 07/31/2018

If those are the forms on the CIS website, then those are the forms they are currently accepting. Also read the form instructions.

You can certainly reapply. We can't predict whether or not you will get a new EAD.

When filing H1-B Renewal (with approved I-140), on which forms any police arrest information is disclosed?

You will disclose your arrest information on any and all forms that requires that information.