I had the same question. The warning that pops up in the software is not worded very well. I am incorporated in Alberta. My revenue is less than $1M annually. What I understand from the reply to the original poster's question is that I can use TurboTax Incorporated and will be able to efile to the CRA, but will also need to mail the AT1 to the Alberta Government. If I do this, I will not be subject to a $1K penalty. Do I have that correct?
