The process for filing an RTI application with the UPSC entails several steps. Candidates must draft a formal application clearly stating the information requested. The application should specify the subject matter and must be submitted to the designated Public Information Officer (PIO) of the UPSC. Accompanying the application, a nominal fee is usually required, which can be paid through an Indian Postal Order or a bank draft. It’s essential for candidates to maintain clarity and conciseness in the application to facilitate an effective response. Following up on the application may also ensure timely receipt of information.