Click on Submit to submit your online application. Go to the college with your Letter of acceptance and ask where the Registration Office is located.There you can ask how to sign up for classes. 1. Apply Online Use the Common App to apply. This is where you will indicate whether you want to be reviewed with or without a test score. Yes and yes, the physical letter will come around 2 weeks later in the mail, and the digital official letter will appear In your portal in 1-3 business days. Go to the online application. You will receive an acceptance email from HCC within a day or two. It will include your HCC ID number. Applications accepted at any time.