Cal. Rev. & Tax. Code § 20638

Upon written request of a person who has postponed pursuant to this chapter, or an agent of such person, or an agent of the affected cooperative housing corporation, the Controller shall issue such person a written statement showing the total amount postponed, together with accrued interest. The Controller may establish a reasonable fee, not to exceed thirty dollars ($30) for the provision of the statement of postponement status provided by this section.