How do you change the name of a checking account to a special needs trust written up as part of a revocable living trust?

You need to talk to the attorney that drew up your trust(s). If the special needs trust is contained with your living trust, then is it in existence now, or when you die? Check the terms. If it exists now, then there should be a name of the trust, a trustee and you should obtained a taxpayer id# from the IRS. Note that a transfer into the trust is probably a taxable gift.

This is not a DIY project. Consult your attorney.