How does CPF Annual Limit apply if I hold two jobs? What to do if exceed limit?

The CPF Annual Limit is $37,740 (both employee and employer's mandatory contribution). Because I hold two jobs, I found out that I had contributed more than the $37,740 last year. However, no refund was made out from my CPF account till date, despite exceeding the limit.

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Does anyone know how and when does the CPF Annual Limit apply to me if I hold two jobs? I will exceed the annual limit this year, and I'm not sure what I should do.