Interviewing at Your Old Company: What Proprietary Information Am I Allowed to Share?

I am interviewing at my old company and will be giving a presentation of an old internship project I did with this company…

My internship project was not customer facing and contains quite a bit of proprietary information about the company. Am I allowed to share old graphs, performance metrics, and incentives around my previous work if I am interviewing with the same company that I completed the project for? My previous work is very relevant to the job I am applying for, so the more details the better… But I don’t want to get in trouble for sharing too much either.