This can be an issue if you have been employed through a placement agency.
Some,not all, such agencies could treat staff as self-employed and place income in box 81.
Lately I notice very few instances of this happening, and I suspect CRA may have a hand in that.
To answer your question, yes, if you think you were placed as an employee, not self-employed, enter the box 81 amount in box 14, everything else as is.
