What documents do I need to cancel my visa in Thailand before applying for a 60-day COVID extension?

Hi all,

Just another question before I go to do the covid visa extension on Wednesday. My workplace has given me the visa cancellation form and told me I need to cancel the visa then on the same day change it to the 60day covid extension. I’ve had it explained to me how to do the 60 day extension now. I’m just wondering what documents I need to cancel my visa if anybody knows? My employer said he will go to cancel the work permit on Wednesday morning but that he doesn’t need my work permit and we don’t need any documents from him after he cancels it, is this correct?