Hello, my name is ***** ***** I will be the immigration attorney helping you today.
Unlawful presence can not be acquired by minors under 18. You would start accumulating unlawful presence every year that you are in the US after turning 18. So if you were 20 when when you left you accumulated 2 years of unlawful presence which means you now have the 10 year ban to return to the US. If your father petitions you for your green card, you would eventually need an I-601 waiver to be approved in order for you to return to the US before the 10 years are up. You can read more about it here https://www.ilw.com/articles/2007,0717-scott.shtm
You would basically have to show that one or both of your parents would suffer extreme hardship if you were not allowed back into the US before the 10 years are up.
I know immigration issues sometimes seem complicated and confusing. If at any time you would like to have a more detailed consultation by phone or if you need help with application preparation or review, I can send you an offer for this legal service to you for a reasonable fee later on. You don't have to decide if you would like that now, but just letting you know it's an affordable option for you to keep in mind.
Good luck to you during this process and I hope this answer has helped you!
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