Major mistake in my UC application! Help!

So on my UC app, I messed up on accurately putting down my academic record as it shows on my highschool transcript. I put that I took a class for 2 semesters but actually took it for one and I also forgot to put econ alongside gov for my 12th grade classes. I’m going to email them soon, but will this ruin my chances?

As long as you have documentation that you contacted the schools, you should be fine. Keep any emails received in regards to your corrections in case you need to appeal the decisions.