Sarfraz,
See attached -- I set up a conditional formatting formula I set up in the BS tab to highlight items that will require reconciliation:
=AND(ISNUMBER(C3),ISNA(C3=INDEX(BL!$D$2:$E$500,MATCH(IF(ISNUMBER(C3),$B3),BL!$C$2:$C$500,0),5-COLUMN(C3))))
You'd probably want to develop a similar reciprocal conditional formatting rule on the BL tab.
All best.