First step would be to get permission from the Taco Bell CEO (probably owns more than 1 chain)
Then come up with a name, what the religion wants to express, core principles to follow, the history and goals of the future, then attempt to get a following going by word of mouth or social media exposure..
Then apply for something called a certificate of formation, get tax exempt status (IRS form 1023 EZ) and establish your "church" meaning you personally can't profit from revenue and get an Employer Identification Number.
Then you're good to go, have meetings, get exposure, create programs and a welcoming environment
Then start a crusade against the false restaurants mcdonalds etc. ---