To apply for SSS unemployment benefits, you must have lost your job due to involuntary termination and have made at least 36 monthly contributions. You can submit your application online through the SSS Member Portal or visit the nearest SSS office if you're in the Philippines. Ensure you have all necessary documents, such as your Certificate of Separation from your employer and your SSS number. It's advisable to check the official SSS website for the most current guidelines and eligibility requirements, as these can vary based on individual circumstances.