Hi,
Do not change the formula, that is fine. Leave it as DATE_FISCYEAR( Tanggal Status, 'K4' ).
What I suggested was to map the 0FISCVARNT infoobject in the transformation rules.
So there is one transformation rule for which target is 0FISCYEAR, and you have already used the above formula in it. Don't change this formula.
Similarly, there will be another field in the target (in the main transformation screen) called 0FISCVARNT. For this field, map the constant 'K4'.
Regards,
Suhas