There is no real difference, but tax disclosure presents a very real social/cultural problem for public companies that are paying very low rates of tax--which apparently includes most or all public companies. The real worry therefore is not a loss of privacy at all but the legitimate worry that sunshine will lead to bad press as data emerges regarding how public companies arrange their tax affairs.
The latest action on the bill, AB 2439, was a second read plus a third reading ordered in the state Senate. From the Aug. 8 Senate Floor analysis, we get this:
Existing state and federal laws generally prohibit unlawful disclosure or inspection of any income tax return information. ... the FTB may publish statistical data related to taxpayer information so long as nothing specific to a single taxpayer is disclosed. Notwithstanding these provisions, the Legislature directed FTB to publish a list of the top 500 tax delinquencies over $100,000...
ARGUMENTS IN SUPPORT: According to the author's office, this bill will ask for the FTB to post one specific data point on its website which corporations already have: corporation taxes paid to California. It simply disaggregates the amount already reported in their SEC 10-K form to be California-specific. This simple data is urgently needed for several reasons. First, California recently made significant changes in its corporation tax system, adopting "elective single sales factor apportionment." This new system means that corporations have a choice of how to apportion multi-state income to California. The FTB has estimated that this choice will cost the state nearly $1 billion annually, beginning in tax year 2011. With this bill, we will be able to accurately determine the distribution of benefits and costs from this drastic change.
ARGUMENTS IN OPPOSITION: The opposition expresses concerns that this bill will result in misleading information that provides no context for a taxpayer's disposition and will provide no objective evaluation of the single sales factor. For many multi-state corporations, their finality tax liability may not be resolved for years after their return is actually filed so the information in this bill may not be accurate. Furthermore, the opposition states that breeching [sic] taxpayer confidentiality is punitive to the individual taxpayer but will not provide further information to the state to determine whether specific tax policies made sense.Regarding the "arguments for," I don't know that the legislature's ability to "accurately determine" things requires the data to be publicly disclosed. The legislature could as easily simply require public companies doing business in California to include the information on their confidential tax returns, which are typically available to state legislatures to review in the aggregate for policy purposes. Someone needs to make an argument about why public disclosure is necessary. There are plenty of available arguments, one need only review the CBCR and PWYP campaigns (or you can read my chapter which examines these arguments).
Regarding the "arguments in opposition," I am not sure why the information is misleading unless companies are reporting false or misleading data to the SEC; if that is the case, we have bigger problems. No, it is not that the data is misleading. On the contrary, it is more likely that the data is likely going to be painfully and inconveniently accurate. True, returns are subject to contestation by the FTB. I would submit that in the name of the rule of law, the process and outcome of agency contestation ought also to be public information (it is not, unless the matter ends up in court). But that is no reason why the original claim is somehow misleading, unless intentionally so by the author. It is the company's stated position at the time it is made.
Interesting typo alert: it is "breaching" not "breeching" that belongs in that last sentence, but the visual of corporate confidentiality as a baby trying to emerge wrong-way around is quite fascinating. Still, they've made the right point--the case has not (yet) been made for public disclosure.