I’m a senior – is it too late for me to take the ACT again?

No!  Some early action/decision applications are due by November 1st; if you are taking the October 25th ACT, you can submit your application, notifying the school that your scores are pending.  Many colleges and universities operate under rolling admissions, so you can submit those applications at any time. We do suggest you apply as soon as possible, though, to take advantage of any merit scholarship opportunities that may be available to incoming students. Always check with the schools you are applying to for their particular requirements.