You should be able to cancel your overrides. Did TurboTax let you attempt a Netfile with overrides. I thought it would not. I understood that the CRA locks you out after 5 attempts. I have used 2 already. The first time, and when TT support asked me to round my box 53 values (although I doubted this was the solution as the CRA message did not allude to this in any way). Only 3 attempts left.
