Ensure that the surcharge -related config is done as per manual instructions of SAP note 2139208. To summarize:
1) In V_t7int1, delimit SR03 till 31.03.2015 & create SR04 effective 01.04.2015.
2) In V_t7int3, create two entries for SR04:
Tax bkt Slab range Return value
01 10000000 <blank>
02 99999999 12