In a bowl, combine the masa and salt.
Stir in one cup of water to make a crumbly mixture. Gradually add the remaining water a little at a time, until you can gather the dough together into a cohesive ball. You may not need all the water, or you may need a little extra. Knead the dough briefly on your counter until smooth. It should be moist enough to hold together, but not sticky. If it's too dry and crumbly, add a little more water. If it's too sticky, then add a little more masa.
Divide the dough evenly into 16 portions, and roll each portion into a ball. This is easy to do with a medium cookie scoop (approximately 2 tbsp capacity) with a release lever.
Heat a skillet over medium heat.
Place one of the dough balls between two pieces of parchment paper or wax paper. If you have a tortilla press, you can press the dough ball flat with that, otherwise, use any flat object to squish the dough. I used a burger press. However, I find that these tools don't get the dough thin enough. After pressing the dough, take a rolling pin and roll the dough a little thinner, so that it measures about 6 inches in diameter.
Carefully peel the paper off the dough. If the dough is the right texture, the paper will peel right off. If the dough contains too much water and sticks to the paper, then you'll need to add a little more masa to the dough.
Cook the tortilla in the hot skillet for 1 - 1 1/2 minutes per side, until golden brown spots appear.
Place the cooked tortilla in a lidded container and place the lid on so the tortilla can steam. You'll find that the tortillas are initially somewhat crispy when they're hot off the skillet, and they need to steam for a while to soften.
Continue to cook all of the tortillas, stacking them in the lidded container so they can steam and soften. Keep covered until ready to serve, so the tortillas don't dry out.
Once softened, serve the tortillas with your favorite taco fillings.