Hello Brad,
Both TurboTax Online ("TTO") as well as TurboTax Desktop ("TTD") offer an interview method in creating your tax profile. After creating your tax profile the software guides you in making your entries. After completing your profile you can still access the information with the left side menu under 'Income' > 'Self-Employment' < 'Self-Employment Intro', and in TTD you can go to the Forms method and enter directly into the T2125.
An important distinction is that Financial Trading is a 'Business' and not a 'Profession'. The NAICS or industry code would be 523000 for "Securities, commodity contracts, and other financial investment and related activities", see: https://www.canada.ca/en/revenue-agency/services/tax/businesses/topics/sole-proprietorships-partners...
TurboTax offers the value added service of Assist and Review for both TTO and TTD, where a Tax Expert can assist you in reviewing your return for accuracy and completion. Our Product Support team as well as out community resources can assist you with more product related or general questions. See: https://turbotax.community.intuit.ca/community/product-information/help/contact-us/00/873707
