First, log on to your New York State Education Department TEACH account to find out what requirements you are missing.
If you received a notice of termination for lack of college credits, you can apply between 2/1/20 and 3/31/20 to the DOE's Career Training Program for the summer semester. The program will pay tuition from 3-6 credits per semester for undergraduate study at participating colleges and universities. Two & 1/2 hours per week of release time and/or a summer stipend are also provided.
If you have more specific questions, contact the UFT's certification specialists: Monica Christie, Jeremiah Bornemann or Stephanie Forbes at (212) 331-6311.