The tolling period is actually the earlier of 1 year or 60 days after declaration of the end of the National Emergency. Since the example is for a plan-based deadline (as opposed to an individual-based deadline like mid-year change in status) and the COVID-19 National Emergency has yet to be declared over, you just add 1 year to the original deadline. So, assuming the 30-day run out period for claims incurred in plan year 2020 means that normally, all claims must be submitted by January 30, 2021, due to the tolling period, the participants will have until January 30, 2022 to submit those claims.
https://www.dol.gov/agencies/ebsa/employers-and-advisers/plan-administration-and-compliance/disaster-relief/ebsa-disaster-relief-notice-2021-01
Just to be clear, you might be confusing the joint notice regarding the deadline extensions with IRS Notice 2020-29 and 2020-33. The extensions were not part of the CARES Act amendments and they are required, not optional like the provisions from the 2 notices.
https://www.federalregister.gov/documents/2020/05/04/2020-09399/extension-of-certain-timeframes-for-employee-benefit-plans-participants-and-beneficiaries-affected
