a358006a_California_Franchise_Tax_Board__What_it_means
[Notice] Request for Tax Information and Documents [What it means] 
Additional information is needed to approve your tax refund. Complete the Request for Tax Information and Documents form and mail it to: Filing Compliance Bureau, MS F151, Franchise Tax Board, PO Box 1468, Sacramento CA 95812-1468. Or fax documents to: 916.843.6036.
Bills and Notices | California Franchise Tax Board
What it means