Hi Raghunadh,
Good mourning,
If you want to store overtime with custom wage type go to pu30 copy wage type from any overtime model wage type (like MM00) then go to V_T510S Table instep of 1205 wage type you can give your custom wage type with same groupings.If you want to change that groupings also For this you have to know about v_t510s table there is two groupings will be there
1. Wage type determination grouping specified in TMON with operation MODIF_W=
2. Day grouping specified in schema with function DAYMO, again DAYMO having 4 parameters 1234
go to the F1 documentation for better understanding.
Then go to table v_t510s with that 2 groupings give your custom wage type with processing type 'M'
under that conditions is there you can map your requirement according to your scenario.
Regards
Kishore