If it is just software, such as a program, it is not the subject of protection by patent law, and it cannot apply for a patent. You can start with the device of the software or the technical solutions used by the software to solve technical problems. Personally, I think it generally belongs to the latter and belongs to an invention patent application. The application documents need to be submitted: Invention patent request, description, description, abstract, description, drawings ( Submit if necessary) Claims. The claims are the main basis for determining the scope of patent protection, so they are the most important application documents. There are great skills in writing them. It is recommended to find a professional agency to entrust them.