If you receive no T slip for this income, you can claim it as self-employed earnings. You can deduct related expenses for cost of production, office supplies, shipping, home office, etc.

The complete list of business expenses can be found here: https://www.canada.ca/en/revenue-agency/services/tax/businesses/topics/sole-proprietorships-partners...

A good answer will include "how" to put these deductions into an online turbotax program.  I don't see the way of doing that right now with the program I've got, and that's the information I need.

As soon as you indicate in the Setting Up section of the return that you are self-employed, the right screens will populate for you automatically in the flow of the return. If you haven't checked the proper boxes, you can find the Business section by using the Find button to search/select Business Profile.