The start date is the beginning date of your current AAP. If June 1st is your plan start date and you are certifying prior to June 1, 2023, for example, then the start date would be June 1, 2022 with the ending date being May 31, 2023.
You can use this OFCCP audit checklist to ensure you're doing what is required to maintain OFCCP's regulations including VEVRAA, Section 503, and EO 11246. Or request a demo to streamline your compliance and recruiting efforts.