Where is TT asking for the address? For a donation to a to donor advised fund (DAF) held at Schwab Charitable? The address for Schwab Charitable is Schwab Charitable P.O. Box 628298 Orlando, FL 32862. It is toward the bottom of https://www.schwabcharitable.org/contact-us
A DAF is not a trust. If you do mean you have a charitable remainder/lead trust (or similar) that Schwab is the corporate trustee, that is another question. If so ask again in more detail.
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