Yes, the amount on Line 43700 should be the total of all tax deducted on your tax slips. If this amount differs, you should go back and check to make sure you haven't made a keying error on your slip entries.
You can check these entries by going to T-Slips > T-Slip Summary and continue through. When you land on a Summary page that has a slip entered, choose to EDIT that slip and you can look over your entries.