I am filing petition,I-130, for my parents and my birth certificate is unavailable/ not found, Can I use my parents affidavits?

No you cannot use your parents affidavits. Baptismal, medical, school or similar secondary records are allowed and you must have more than just one...

Do I need immigration lawyer?

You would need to be a citizen and at least 21 years old. There are many other qualifying questions that need to be answered. You probably should...

Who needs to be included in I-864? In addition to my foreign wife.

Yes, you do need to include your parents on your I-864.

Since you have communicated your address change, there should be no problem with your move to another state.

What is your best guess as to when the 'Filing cut-off Date' (not the final action date) for F2A visa category will advance?

Not only can we not tell you if it will advance, there is always the possibility it may regress. It is a numbers game affected by many variables...

I got my green card through my husband and I'm going through divorce now. Will my green card get effected.

Based on your facts presented, your divorce should not impact your green card.

Grace period

The grace period is 30 days immediately following completion of the course or training.

Is it better to get married now or wait?

Providing evidence of a good faith marriage is always critical in situations like yours. Co-mingling of all aspects of your marriage becomes very...

Can my mom request a green card for my brother?

She can apply for her son under the F2b category, which depending on the appropriate country, will take years before the priority date will come up.

Can I leave the US before receiving Travel Authorization (form I-131) and have someone sending it to me before coming back?

What you are proposing constitutes abandonment of your adjustment. Wait for your TA.