Too late to change CSS?

So I haven’t had contact with my father for about half a year, so for the CSS I filled out a non custodial parent waiver. For most of my colleges, the deadline to submit the CSS was February 15th. However, a few days after this, I managed to make contact with him again. Should I try to change my CSS? Should I Email my colleges beforehand? It’s not a guarantee that he would be willing to fill out the forms in the first place. I have not seen him in person in a while, and he does not contribute financially to my life.