First link I got to said: "A tulpa is a thoughtform/being you create with the power of your mind. They are completely sentient and can talk to you. It's like splitting a piece of your mind off that turns into another person. Eventually you can impose them into the real world, as a forced hallucination. A tulpa can have access to your subconcious, and can recall anything there for you."
Using this definition, wouldn't a self projection as god be considered a tulpa?
Is the being is created from your mind? Check.
Is the beings personality and wishes part of the creators subconscious? Check.
Does this being supposedly talk to you? Check.