Do I need to cancel my Non-B work visa before applying for the DTV visa?

The process of applying for a DTV visa while on a Non B work visa can be complex. It is generally advised that you cannot hold two visas simultaneously. If you are indeed on a Non B visa rather than an extension of stay, you must wait for it to expire, as it cannot be canceled. However, if you are on an extension of stay associated with a work permit, you would need to cancel your work permit first, then present documentation of its cancellation to immigration in order to cancel your extension before applying for the DTV visa. There have been cases where applicants were asked to cancel their current visa before processing the DTV application.