If you want to apply for OSAP without signatures or supporting documentations from your parents, there are two scenerios to consider:
Scenerio One: Have you been out of high school for more than four years? I understand you are a second year university student, but prior to your first year, were you out of school for four or more years? If that's the case, then you can apply for OSAP without your parents signatures.
Scenerio Two: If you have not been out of high school for more than four years (for example, you went straight from high school to university), then you will need supporting documentation and signatures from your parents. If you cannot obtain these, you must give OSAP a good reason for why you can't (for example, a restraining order, or police report).
You may even be 18 or over, but because you have not been out of high school for more than four years, you will have to get your parents signatures for your application.
Any questions you may have regadring OSAP are best answered by the financial aid office at your school. Your financial aid office should be the first place to start if you have questions about current or future OSAP loans.
Since each students' situation is unique, contacting the financial aid office is the best place to start.
Set up an appointment with them and explain your situation and they should be able to assist you further. I hope that answers your question!