Sec. 26. (a) A taxpayer operating in the motorsports investment district that files a consolidated return with the department also shall file annually an informational return with the department for each business location of the taxpayer within the motorsports investment district.
(b) If the department is unable to determine the extent to which taxes remitted by a taxpayer are gross retail incremental amounts or income tax incremental amounts for purposes of IC 4-10-23, the department shall use the best information available in calculating those incremental amounts.
(c) The department shall adopt guidelines to govern its responsibilities under this chapter.