Fla. Stat. § 473.319

Public accounting services as defined in s. 473.302(8)(a) and (c), and those that include tax filings with federal, state, or local government, shall not be offered or rendered for a fee contingent upon the findings or results of such service. This section does not apply to services involving federal, state, or other taxes in which the findings are those of the tax authorities and not those of the certified public accountant or firm. Fees to be fixed by courts or other public authorities, which are of an indeterminate amount at the time a public accounting service is undertaken, shall not be regarded as contingent fees for purposes of this section.