I have FSA account for child care for my son but I do not claim him on my tax return however im being asked to put in my sons info. will this mess up mom's tax return?

I have a dependent care FSA account for my son through work and when I put in that information off my W2 it's asking for his social and information. His mother claims him on her taxes. Will me submitting his information be an issue with her claiming him? How do I go about adding that FSA amount from my W2 and I do not claim him as dependent?