Troubleshooting

Yes I know about that page. I’ve read it. But it says I have to calculate my tradesperson deductions first if I qualify for any. Then calculate my apprentice deductions. I’m asking how do i know if i qualify for tradespersons deductions? I know i qualify for the apprentice deductions. But I need to know if i qualify for both. The CRA isn’t clear on what they consider to be a tradesperson.