Author: Bruce4Tax(Taxicorn)Taxicorn 30 Mar 2021
Sorry, its under the heading Australia Individual - Other taxes
https://taxsummaries.pwc.com/australia/individual/other-taxes
From memory, govt argued that it was a levy, not a tax, when it was introduced.
Tax offsets do not reduce M levy (other than Forn tax credits) so probably not a tax.