Used wrong form

So in February of 2019, I won a contest through Tim Hortons (in Michigan), the prize was a $2500 prepaid Visa card. I never received a tax form for it and tried to find out what I needed, but to no avail. So when we filed I just put a claim down under a W2-G I think it was, for $2500 and there was definitely money deducted from what we would've received. Then over a month after we filed I finally received the form in the mail and now I don't know how much trouble I'm in. Lol What do I do??