Jar size and elevation affect canning times. There are lots of sources available where you can match your circumstances to time and pressure.
I'm relieved to be taking this year off from canning because I overdid things last year and still have tomatoes and tomato sauce in jars and even some in the freezer from when I ran out of jars. Usually my kitchen is a canning workshop by the end of August and it's been quite relaxing this year.