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
2. For retro you have to remodified retro pcr X042, X043 & X044.
Please check and tell me.
Regards,
Sankarsan