I'm taking 3 different college courses this year, which will be my Sophomore year of high school. I've looked every where yet I can't find any information on Oxfords policies regarding accepting these credits. Any informaton on the matter would be great!

The entire educational system in the UK is very different, and just like when international students are accepted into universities in the U.S., there are a number of factors considered in the decision to give credit for previous work. One thing I can tell you is that generally in Europe, when someone graduates from secondary school it is considered the equivalent of an associate's degree from a community college in the U.S., so you would probably get high school, not college, credit for your community college courses (and why on earth are they letting you take community college courses as a sophomore? Is your school so inadequate that they can't challenge you sufficiently that early in your high school career? I'm a university professor, and I find that really disturbing).