Are you referring to the 2019 tax return? If so, then you were a dependent and not eligible for the stimulus. One semester of school is all it takes to be a full time student.
You still get the stimulus payment. You just have to wait 10 months.
Under the CARES Act, if you are claimed as a dependent on someone else’s return you cannot receive a stimulus check, in 2020. If you were claimed as a dependent for 2019, but will not be for 2020, you will most likely get it in 2021.
"In essence, the stimulus check acts as an advance of a person's 2020 income tax refund. This means when he prepares his 2020 income tax return, there will be a line to include the section 6428 credit. The credit on his 2020 return is subtracted by any amount received as a stimulus check in 2020. If the amount he received as a stimulus check is less than the credit he is due, the difference will be included as part of his 2020 refund. If he has been overpaid by receiving the stimulus check, however, he will not be required to return any excess amount".