I'm planning a sofa/hall type table using turned legs. It will have a
lower shelf. The legs I will be buying have a squared section in the
profile for the lower shelf to attach to.

How do I attach the shelf to the leg? Do I notch a section out of the
leg for the shelf? Do I notch a section out of the shelf for the leg?
And would I use dowels in either case.

If anybody knows where I can get of a sofa table plan with turned
legs, please let me know.

Thanks