In California, a name change requires a court order. For instructions on how to change your own name, go to:
For instructions on how to amend a birth record, see:
Frank W. Chen is licensed to practice law in the State of California. The information presented here is general in nature and is not intended, nor should be construed, as legal advice. This posting does not create any attorney-client relationship with the author. For specific advice about your particular situation, consult your own attorney.
You don't need a lawyer to obtain an order to change your name, including changing it back as described in your question. Click on the link provided by Mr. Frank Wei-Hong Chen, and follow the instructions. Your local court likely has a free self-help or facilitators office that can also provide assistance.