Form 501 query

WHILE FILLING 501 WE HAVE EXCESS CREDIT CARRIED  FORWARD OF LAST YEAR'S LAST RETURN SO IN ANNEXURE A OF 501 NOTE IS GIVEN THAT THE

NOTE:IF THE REFUND IS BROUGHT FORWARD FORM EARLIER RETURN PERIOD THAN THIS ANNEXURE PERIOD SHOULD BE FROM THE FIRST DATE OF SUCH RETURN TILL END OF THE RETURN PERIOD TILL REFUND IS CLAIMED

SO DO WE NEED TO FILL ANNEXURE A FOR 2 YEARS?

AND IF YES DO WE NEED  TO FILL ANN B,C,D ALSO FOR 2 YEARS?