Coving by staircase

[DIYm1]

Guys

How does one finish the end of the coving on the wall that leads up the staircase - ie how does one blend it in (I am not putting any coving parallel to staircase as it curves upwards?
(i hope you see what I mean)

Thanks

 

[noseall]

use a mitred stop end.

 

[noseall]

herehttp://www.gypsum.ie/diy/hintsandtips.htm