MBT Late Payment Penalties Will Not Be Assessed When an Annual Return Is Filed Early and the Payment is Made on the Due Date
The following statement from the Department of Treasury seems to clear up some confusion regard the imposition of late payment penalties.
"As was stated before, the blog is incorrect as to both the law and the department's practice. To clarify, a taxpayer that files an annual return prior to its due date will not incur penalty and interest on an amount owed provided the entire amount owed is paid on or before the original due date. (This is, of course, an issue separate from the question of timely and adequate payment of estimates. And this conclusion does not apply if the payment is made during the period for which a filing extension has been granted.)
If there is any case in which penalty and interest have been asserted by the department for an annual return payment that was made after the return was filed but within the original filing deadline, that was a processing error by the department. An affected taxpayer should contact the MBT unit of Customer Contact Division and the error will be corrected."