Can I attach form 8958 to e-file? If not I was able to fill out the community property section, will that be good or do I still need to send the form 8958 with it?

No. Turbotax like most if not all self-prepare apps does not allow attachments to an e-filed return

who must file 8958

This form is intended for individuals who:
1. Are subject to community property laws, and
2. File separate federal income tax returns.