<p>So I listed that I would take an astronomy course and an astronomy lab at my community college for spring 2012. But I was not able to register for these classes as they filled up with no more space. I have to take different science courses. My major is anthropology and these courses are not towards my major, but rather to complete science requirement of igetc.</p>
<p>Go to the UC application site and update your classes/grades, if you haven’t already.</p>
<p>You should be fine if you’re able to take something else that fulfills the same requirement 
Good luck! BTW, even if your TAG is invalidated (for some other reason), your application isn’t ;)</p>