It was part of the ACA that adults can remain on their parent insurance until age 26.. Now that Trump has been elected, when he repeals Obamacare will I still be able to remain on my parents Providence health plan? Im 20.
It is unlikely that they will return to the system as it was before Obamacare was passed. Much more likely they will replace it with a different system that is yet to be created.
What this new system will be will depend on the bill(s) that are debated and passed in Congress over the next year. So your question can only be answered by paying attention to the legislative process when the matter comes up for debate and vote.
I suspect that things that are extremely popular with people, including this provision for people staying on their parent's health plan until age 26, will be retained when they change the system.
If you and others contact your congresspeople in large numbers demanding that this provision be retained, the politicians WILL listen to the masses. Politicians know very well that if people are upset enough to contact them in large numbers, they will be upset enough to vote against them on election day.