Verify the expiration date of your present visa on your immigration paperwork and start preparing so that you may submit your application well in advance. You will need to begin planning for your visa application at least one month in advance and you must submit your application for a visa extension before the date on which your existing visa expires, if not before. Three months before the expiration of your existing visa is the earliest you may apply. On an individual basis, the Visa and Immigration team can provide additional guidance.