Can I take later ACT tests after I apply early action?

My current ACT score is not that great, so I plan on taking the one in October. However, I will not get the grade back for the test until after I apply early action. Is there a possibility I could change/give new test scores after I apply?

Ask the school!

If you take the test before the EA deadline, there may be some leeway regarding delivery of the scores.

Thank you very much for the reply!