<p>Unlike the US, in the UK new students always start in the first year (with some very rare exceptions). So your application will be treated as a fresh application. It is not compulsory to enter any grades received after high school ended as far as I know*.</p>
<p>Note that there is no such thing as a transfer student, so it’s unlikely that you will be able to transfer any credits.</p>
<p>“Qualifications” really refers to completed courses of study. You are under no obligation to report grades from a college which you left before graduation. However, if they would help your application, you should put them down. Also, it’s difficult for a US high school graduate to enter a UK university. Most successful US applicants have spent at least 1 year at a US college. So that’s another reason for entering your grades.</p>
<p>*it might be a good idea to check with UCAS, just to be sure.</p>