[CA] lied about dates on resume

I am scared shitless because I just gave an interview at shoppers and realized I gave them the resume that had the wrong dates of my previous job i intentionally put for another job that was asking for 3 years of customer service experience. I was desperate after applying to 100s of jobs and getting nowhere. If I apologize and come clean, would that help my case?

I worked at my previous job from 2023 August until 2025 December but on my resume I put 2022 August until 2026 March. I am not somebody who lies and it's eating me up. Should I come clear to the manager? What if he calls and asks my previous employer about the dates, etc? What should I do?