Question 3: If my parents got their green cards from the Visa Lottery, and I'm older than 21, can I have any way to apply and go to the USA to live with them? They already are living in the USA.

Carl Shusterman's Answer: Your parents may apply for you, but expect a long wait. You are in the 2B category, which is backed up over seven years. In general, just because your relatives file a visa petition on your behalf does not give you permission to live in the United States while you are waiting for your "priority date" to become current.

Your priority date is your place in line for a green card.

The word "current" means that you have reached the front of the line.