Slice the hard-boiled eggs in half, length-wise, and transfer the yolks into a large bowl. Set the cooked egg white halves onto a large plate. 

Mash the yolks with a fork, add the guacamole or mashed avocado, pico de gallo or salsa, shredded cheese, and a pinch of taco seasoning. Stir to combine the ingredients until the mixture is cohesive. 

Transfer the filling to a plastic zip bag or piping bag. Cut the end and pipe the filling into each egg white half. Alternatively, use a spoon to fill the egg halves with the mixture.

Place the deviled eggs onto the plate and refrigerate for 1 hour before serving.