If you are a Director of a company you will need to provide evidence of your Self-Assessment tax return and/or provide all evidence of income and additional income.
Os ydych chi’n Gyfarwyddwr cwmni bydd angen i chi ddarparu tystiolaeth o'ch ffurflen dreth Hunanasesiad a/neu ddarparu'r holl dystiolaeth o incwm ac incwm ychwanegol.