Filing

Thanks for pointing to this location, I didn't know it exists.

 

Indeed, in there I can really see an amount under -

Unused tuition and education amounts from previous years, for both Federal & Provincial

 

Which is the amount where the figure came from in my wife's filing. At least now I know where it came from, not something she filled in but auto populated from CRA records I would have guessed. I wonder when the records got pulled from CRA though, the only time I can remember pulling from CRA is using the auto-fill function, which is for the T-slips I think, not sure about this one.