Basic Personal Amount prorated incorrectly

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I lived in Canada for less that six months and made less than $15000 during that time. I moved and made no money the rest of the year. TurboTax is prorating my Basic Personal Amount even though more than 90% of my income came from Canada. How do I fix this? I am using the online version. I read that I can override this in the paid desktop version, but I see no reason to pay for this just to correct TurboTax's miscalculation.