Oqlahoma misprint all copper on 1 side you want to sell it where can you go?

1. That's Oklahoma

2. Coins are struck or minted. Printing requires paper and ink, like dollar bills.

Anyway, what you have sounds like a "lamination error". The outer nickel-copper cladding is missing from one side of the coin, so the inner copper core is visible. Lamination errors happen more than you might expect, but still aren't all that common in circulation due to improved quality control at the Mint.

Current retail values for a state quarter lamination error are in excess of $15. You might be able to sell it to a dealer or at a coin show, but you'd only get wholesale for it - maybe $10. eBay is another alternative but coin prices there tend to be a free-for-all and aren't always reflective of market realities.