If you try to terminate the 2018 enrollment, you will get an error code if date you are specifying is in December or earlier. This is because you can’t terminate an enrollment that has not started. If you try and change the effective date, while the enrollment year is still listed as 2018, you will be told the termination date will be 1/31/2018. If you follow through with the termination, you will be enrolled for the month of January for a plan you don’t want.
