Please go into Forms mode and look to see if any forms that you don't need are open. If you do see one that you don't need, choose Edit > Forms > Clear Current Form, then Edit > Forms > Close Unused Forms to get rid of it.

So when I get to the stage of saving a copy of my completed return it asks if I would like to close all unused forms. I always say yes and yet I still get all these annoying warnings and tax savings suggestions. Most of these I've already indicated don't apply to me during my profile setup. I know turbotax is trying to be helpful but it is usually just annoying and confusing. I ended up just choosing the ignore option. Probably what I did in years previous but didn't remember.

I got the same error.  Tried to clear the unused forms but this was already the case, Still had the error, submitted to CRA anyway and it seemed to send.

Have changed my property status in the past year.  Hopefully I don't need to deal with another CRA audit. At that point I will just give up and hire a tax lawyer, give them the supporting evidence and  upwards of 1500 bucks to support a cottage industry from CRA.  

Honestly, in the past TurboTax has been really good.  This is the first error and first year.  Has Intuit reached out to CRA to flag this issue?