Start the application process the summer before your senior year. You can also do a lot of prep work your junior year, such as taking the SAT, researching campuses and visiting them, getting recommendation letters, and adding to your extracurriculars. Use the Big Future college application timeline to guide you through the process.

Check with the college to see which is preferred. Most colleges prefer online applications because they’re easier to review and process. Some even offer a discount on the application fee if you apply online. Applying online can also be more convenient for you—it’s easier to enter information and correct mistakes

Whether you go with Common App, Coalition, or directly through a college, you’ll be taken through the process step by step by the online application platform to see where to enter your information.
You may also need to upload documents like your transcripts and confirm that letters of recommendation have been submitted by your recommender. Some platforms have a link your teachers can use to fill out their recommendations instead of giving them to you. Check with your counselor if you’re unsure.

Most begin accepting applications in early August. If you know you'll have a busy senior year ahead, consider gathering your materials, so you can start the process in January, June, August and September.

Even if you're meticulous when completing your college application, there's a chance that you'll make a mistake. You may leave out something, fail to follow instructions, or do something incorrectly. If you realize you've made a mistake, don't panic. College admissions officers aren’t going to nitpick over a minor error, but several errors may show you in a bad light. If you have significant errors or omissions, reach out to the admissions office of the college you applied to.

The best option is to ask your school counselor how to proceed or contact the admissions office of the institution directly.