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<p>The biggest issue is that most applications have a late December or early January deadline. If you take your SAT in the fall, you are only giving yourself 1-2 months to figure out which colleges you can apply to. THEN you have to work on your applications.</p>
<p>If you instead already know your SAT scores by the summer, you can narrow choices and work on your applications all of the fall. Which is what yankeesfanatic also suggested.</p>