Having exactly the same issue. I get this explanation, even though I chose "No" in the drop-down to indicate none of those situations apply to me. 

You do not qualify for NetFile Québec for the following reasons:
Your Québec return cannot be electronically filed because you have indicated being in one of the situations which excludes electronic filing. Common examples of this are, in bankruptcy status according to the records of Revenu Québec, made support payments to more than four ex-spouses, paid foreign taxes to more than one country, etc. 

@TurboTaxAniquacould you help?

TT is still saying I cannot Netfile in QC. Any advice @TurboTaxAniqua ??

I spent 2.5 hours with support today because I could not netfile Quebec returns. CRA netfile worked fine. Intuit had no clue what the issue was despite try this and try that and ultimately told me to print my returns and mail them. 

I've used TurboTax for 15 years and never had an issue. Needless to say I'm very disappointed in the software and their lack of knowing what's wrong. There seems to be loads of issues this year.