Accrual based on percentage of overtime with expiry 12 months after month, balance was accrued

Summary:

We got the requirement to calculate accrual based on overtime worked in the given payroll period. Accrued balance will expire 12 months after it was accrued, if not used within the given period.

Content (required):

1. I have setup an accrual plan with the Anniversary year plan term and Anniversary Event rule as a formula, which returns 31/12/4712.
2. Wrote accrual formula which will get overtime worked in the payroll period using the value set then apply the percentage.
3. How can we set expiry date for the accrued value calculated in step 2.

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Code Snippet (add any code snippets that support your topic, if applicable):