TurboTax can handle employment income, self-employment income, and foreign income, so pretty much everything you are likely going to need for your Canadian Taxes. For
If you have questions or need help with US taxes, please visit the website for TurboTax USA.
As for what you can or can't do under an open work permit - you would need to talk to someone knowledgeable in the subject, like Immigration, Refugees and Citizenship Canada.