I have just run into this problem too, but not doubled - just 555 over what we entered. We've just been asked for receipts which is when I realized the amount claimed on the tax form is not the same as the numbers entered in the program. Is there a glitch in the program?? Never had this issue in other years we were asked for receipts. Quite miffed, not just about the money we now owe, but that it'll cause the cra to question the rest of our tax return.
