Thanks for your reply.
Let me expand on my original post. There is a yes/no field in a form as a tick box, and what I need is to record the date when a user ticks that particular field.
Could someone please tell me if it is possible to record (Date stamp?) when a specific 'yes/no' field in a table is changed from false to true? i.e. record the date in another field in the same table.
Many thanks