Place the cubed potatoes and kosher salt in a large pot or Dutch oven and fill the pot with enough cold water to cover the potatoes by about an inch.
Cover the pot with a lid and bring to a boil over high heat.
Once at a boil, remove the lid, reduce the heat to medium, and continue to simmer until the potatoes are just tender, 13 to 15 minutes.
Once the potatoes are tender (you should be able to pierce them with a fork, but there should be a slight resistance), drain and let cool at room temperature for 10 to 15 minutes.
Transfer the potatoes to the same pot that you boiled them in, then using a potato masher, gently mash the potatoes 4 to 5 times – you still want some chunks!
While the potatoes are boiling, whisk together the mayonnaise, mustard, sweet pickle relish, parsley, hot sauce, black salt, pepper, smoked paprika, garlic powder, onion powder and celery seed in a large bowl.
Fold in the diced tofu, onion, celery, and pickles until coated in the sauce.
Add the potatoes to the same bowl, mixing to combine with the rest of the ingredients.
Taste and adjust seasonings, if necessary.
Cover and refrigerate for 2 to 4 hours.
Serve chilled and garnish with a sprinkle of smoked paprika and chives. ENJOY!