Deductions & credits

For clarifications purposes:

 

Does the 18 year old need to be college up to and including age 19? If the child is not in college what are the implications?

 

It should be noted that the child in question completed the 2019/2020 fall semester of full time class load only and is not continuing college at this time and is instead pursuing regular employment.

 

Also, please clarify "Sunset Clause"?