I was in your position earlier this year and agree with Jennifer's advice. I used an email that was sent company-wide about setting employee's goals to preempt my discussion. I put together a bullet point list of my contribution that raised awareness, revenue or were additional to my job description. I told my manager that I would like to set a meeting to discuss and he agreed. After the meeting, a waiting game commenced and I didn't hear back. I was kicking myself for requesting the raise even though I had taken on a lot of extra responsibilities including management of a junior employee this year. I used another company email that said all changes were due to company documents to follow up with my manager and that action resulted that was finalized in the next quarter. I found that you have to be persistent while professional to go after what you want. Due to the pandemic, I had to wait until the next quarter to receive the raise due to budgetary matters but my persistence paid off and I'm glad I fought for the increase. Good luck!