l am having a problem with the indicators, having a mind of their own!! After doing some research, this seems to be a common fault in the 206. It was suggested by other owners to remove the steering wheel case and spray the indicator stalk with wd40. But,, l cannot find the screws!!!!

try looking on the back of the steering wheel.

If the car has air bags, it is better to let a professional work on the steering wheel.

l think you mean the 'steering column casing' do not you?
The screws will most likely be on the bottom of the casing.

On every Peugeot l have ever had, u first remove the plastic covers under the steering wheel. Small phillips screws r hidden in deep holes in the plastic. Usually there r 4 of those.
Maybe after removing the 4 screws underneath, the plastic can be lowered & the UPPER plastic cover can be removed? On some models, there were new screws, not hidden.
NOTE: You never have to remove the steering wheel to remove the indicator stalk. NEVER!
You can usually remove the indicator stalk with a small TORX screwdriver (star-shaped). CAREFUL, on a 306, the stalk easily falls apart into 2 halves, & a little 'slider' falls on the floor. The 206 may be just as fragile.

l have tried to repair indicator stalks by opening them. (205, 305, 405) IMPOSSIBLE. They contain springs, sliding contacts & small copper surfaces. Cannot be serviced, only replaced.
Sorry. good luck.