Not necessarily on the tax filings. Remember, even if accrual based the M-1 section of the corporate returns will flush out non-deductible T&E, Allowance for Reserves, MACRS book to tax differences among other things.
Pinksheet stocks don't have to comply with GAAP accounting practices! They don't even have to file financial staements at all to trade on the pinksheets. A pinksheet stock is unregulated!