Unfortunately I have never made a witch hazel tincture. I dont even have a witch hazel tree here, had one at a customers house but it wasn't very happy and died in a drought. They are quite slow growing and therefore rather expensive trees, which is why it wasn't replaced.

If you look at pfaf there is medicinal information about it not really a recipe but if you can't find anything more useful than that I would do something similar to the mahonia strip some bark off and put it in some vodka.

https://pfaf.org/user/Plant.aspx?LatinName=Hamamelis+virginiana