If you already respond to college admission letter with yes can change it?

Once you've accepted a college's offer of admission, it's generally possible to change your mind, but the process and consequences vary depending on the college and the timing. You should contact the admissions office immediately. Don't just assume you can change your mind without informing them.

Here's what you should know:

* Timing is crucial: The earlier you contact them, the better. The closer you get to the start of the semester, the less likely it is they'll allow you to withdraw your acceptance. They may have already begun allocating resources based on your acceptance.

* Reasons matter: While you don't need to give a detailed explanation, having a valid reason (e.g., you received a significantly better financial aid package from another school, a change in your family circumstances) might make the process smoother.

* Consequences: You might lose your place in the incoming class. There's a possibility of a negative mark on your record, though this is less common. The college might also rescind your acceptance, meaning you can't apply again in the future.

* Alternative options: Instead of withdrawing your acceptance completely, you might explore deferring your enrollment to a later semester (if the college offers that option).

In short: Contact the college's admissions office as soon as possible to discuss your options. Don't delay, as waiting could significantly reduce your chances of changing your decision.