How long should canned tomatoes be boiled in a water bath?

As each jar is filled, place it on the rack inside the canner, which should be filled with hot water that is not boiling and should cover the jars by one to two inches. (If more water is required, add it at this point.) Canner’s lid should be on before water is brought to a boil. At a low but consistent boil, process the quarts for up to forty-five minutes and the pints for forty minutes.