if your sauce is ketchup or tomato based and you've added ingredients like honey, molasses, vinegar, spices etc. then all you have to do is bring it to a boil for a while and put it into ball jars. No boiling bath is required. Just fill the jars to within 1/4 inch from the top and put the lids on finger tight. When they're cooled completely, tighten the lids. It will be shelf stable for up to a year without refrigeration.
Why do you have to do a hot water bath or pressure cook it? For all my canning (salsa's, pickles, jalapenos, etc.) I just pour the hot liquid into the jars and wait for them to seal. With all the vinegar and acid from the tomatoes and what I add is enough to preserve the contents in the jars?