Wash the jars, lids, and bands with hot soapy water. Keep the clean jars warm.
Fill the canner 2⁄3 with water and turn it on to warm.
Ladle the hot salsa into warm pint jars, leaving 1⁄2 inch (1.25 cm) of headspace.
Release all the bubbles, add more salsa if necessary, clean the jar rims with a clean damp towel, add the lid and screw on the bands to fingertip tight.
Place the jars in the canner, making sure that the water is at least 1 inch (2.5 cm) above the jars.
Once the water has come to a full boil, start a timer for 20 minutes (adjust for elevation). After the full processing time is completed, turn off the heat.
Take the lid off the canner and let the jars sit undisturbed for 5 minutes.
Using a jar lifter, remove the jars from the canner and set them on a clean kitchen towel. Keep each jar two fingers apart and allow them to cool completely for 12 hours.
Check each seal, remove the bands, and, if needed, wipe each jar clean with a damp washcloth.
Label each jar with the contents and the date. Store out of direct light.