There are six different kinds of internships For a Government, Finance, and Journalism internship the deadline could be as early as the Fall (a year previous to when you would start) For all others they are most commonly due between January and April.
May need to have completed a certain amount of credits Some only take students with a specific kind of major Many may need you to have completed specific classes, such as math or science classes These requirements will vary depending on the internship so they should be looked into.
Documents need to apply: 1. Transcripts 2. Letters of Recommendation 3. Resume 4. Cover letter Also a list of some extra curricular activities and accomplishments could come in handy
You never want to come across as pushy so a polite follow up a day or two after sending all your documents would show you are really interested in the job This will also insure they received everything they need Sometimes the employer could also let you know when a decision will be made or what the next step in the process is