I put that I am a full time student before I read an answer to someone's question that said if I go to a military academy I cannot be counted as a student. Do I need to go back and change this, and if so, how?

Based on what I was able to find, you would not be considered a "full-time student at an eligible school", since the academies are not 'eligible schools' for tax purposes.

An 'eligible school' is defined as follows:  "If your school participates in the student aid program run by the Department of Education, then your school counts as an 'eligible' school.

To correct this entry in your tax file, you would have to delete the Student Information Worksheet (and any associated worksheets).

See: How do I delete forms in TurboTax Online?

After deleting the Student Information Worksheet, log out of the program. When you log back in, use the Delete a Form tool to confirm the Student Information Worksheethas been removed from the list of forms in your return.