You may also be liable to further penalties under the TCMA (Wales) Act 2016, such as penalties for inaccuracies in tax returns and failure to pay tax.
Efallai gallech hefyd fod yn agored i gosbau pellach o dan Ddeddf DCRhT (Cymru) 2016, megis cosbau am anghywirdebau mewn ffurflenni treth a methu â thalu treth.