Accrued balance of accrual plan Expiration date will be after 1 year

Summary:

We have one Accrual plan, where employee will accrue balance though out the year, if some one accrued 1 balance credit on 4 Jun-2025 it will be expired on 4 Jun 2026, or if some one accrued balance on 25-Dec-2025, it will be expired on 25-Dec-2026.

So please guide me what setup need to do in accrual plan, or if Fast formula need to write, what will be the fast formula type, where I will attach this formula.

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