Hi Zulfikarlos,
As per your query you want to do the Pro rata on Infotype 14.
Please go through the below step by which you can do it.
1. Assign PC 47 as a custom Z against your IT14 wage types. Then modify the standard pcr and add custom pcr in subschema.
Z011
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2. For retro you have to remodified retro pcr X042, X043 & X044.
Please check and tell me.
Regards,
Sankarsan