Remove the spout/spile/tap from the tree using the back of a standard hammer. (or you may choose to use a slide hammer if you are using stainless steel tubing spouts.) Gently pry out the tap without damaging the bark.
The tap hole will heal itself. Some sap may continue to drip from the tree as the tree works to heal itself. This is normal. Do NOT plug the tap hole.
If you have reusable taps — such as the Smoky Lake Stainless Steel Bucket and Bag Spouts — clean the taps with hot water, let air dry completely and store until next season.
See Also
Collect Sap/Make Syrup - Tap My Trees - Maple Sugaring for the Hobbyist - Maple Syrup ProductsMaple Syrup GradesYes, Your Maple Syrup Can Go Bad, Here’s How to CheckBulletin #7036, How to Tap Maple Trees and Make Maple Syrup - Cooperative Extension Publications - University of Maine Cooperative Extension