Can i go back to the USA ?

You did not provide us enough details to give you any specific suggestions.

Green card holder filling bankruptcy, please help!

Although bankruptcy is a federal area of law, bankruptcy and immigration are still two separate areas. However, you will need to fill out an...

Use Form I 90 before its expiration date to get it renewed.

I am currently in the US on a B-2 visitor and an employer has filled an i-129 form for to get my TN visa, do I have to return ,

If you filed something on time (I-129, in your case) while you still have a valid visa (B-2 in your case), you can lawfully remain in USA while...

How many months can a US citizen stay in South Korea in a year?

If you are a US citizen, you do not have to worry about overstaying in any country. You are free to do what you want.

Change of status from H1 to F1

Well, if you get your change of status to F-1, you will need to attend classes and make progress towards completion of your degree.

When will my green card be issued?

It is likely to be issued within the next several months unless they are problems with your filing.

In the most recent form I-864, in Part 6 item 4, What date should I use if I want to convey that I have never worked?

Then, how do you expect to use an Affidavit of Support if you had never worked?

Will I be likely denied a J2 (with 2-year home residency requirement) if I already have an EB3 petition filed at the NVC?

Yes, if you already filed a EB3 petition, your second petition for J-2 visa will be denied based on my experience.

How much would it cost to get my daughter an immigration visa? and how long will the process take?

We do not exactly all specifics to answer this or other questions related to your daughter.