If your business is less than 10 years old and you've done any work that required planning permission you will need to send proof that this has been granted.
Os yw'ch busnes yn llai na 10 mlwydd oed ac rydych wedi gwneud unrhyw waith yna mae angen caniatâd cynllunio arnoch, bydd angen i chi anfon tystiolaeth bod hyn wedi'i roi.