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(1) Applying: Early Entry is only for UNCC students. Application to the Early Entry program is discussed here: https://cci.uncc.edu/academics/computer-science/5-year-babs-ms-degree-program.
You apply to the CS MS program using the standard Graduate School application process. The process is completely on-line. The on-line application is exactly the same as if you were applying to the regular CS MS program, except there is one check box you should check indicating that you are applying for "Early Entry". (Note, do not check the "accelerated masters" program checkbox, that is something completely different from "Early Entry").
See also: How do I apply for admission?
(2) Early Entry Form - after you are admitted, you need to follow the procedure in FAQ item "How does "double counting" work in the Early Entry Program?"