Is 205 a good PSAT score for a sopre?

That's a great PSAT score! It's very close to the National Merit qualifying score, and you have a whole year to improve. Those are good, solid SAT scores too. As for colleges, you're definitely going to get into a good school. But once you start applying to Ivies, there's no telling whether you would get in. Make sure you are taking the most challenging cles your school offers (APs, etc) and keep up your extracurriculars!