Yes, this is possible. It could be that you are entitled to the working income tax benefit (WITB). This is a refundable credit intended to provide tax relief for low-income working individuals and families. If you are eligible for this benefit, TurboTax will automatically calculate this credit based on the info provided on your return. For more info, please see http://www.cra-arc.gc.ca/bnfts/wtb/menu-eng.html
It is not a negative figure. I entered my T4 info, and on my summary it shows that I paid around 3500$ in tax, further down it says that my tax refund is 6400$, nowhere does it indicate that this is a negative value.
