Can anyone clarify please ... if an official HMRC voluntary disclosure is made, are the penalties purely behaviour-based (i.e. % of the tax due) or can they also include late-filing and late-payment penalties? This is not for one of the HMRC campaigns by the way, just a general disclosure.

If it can result in all penalty types being applied, then what's the benefit of taking this route as opposed to simply re-submitting accounts and calculating the penalties due?

Thanks in advance.