Tapering jig 3/4 inch

I want to taper small legs for a table. I bought an aluminum tapering jig but I can’t get it to work

The taper at the bottom is only about 3/4 inch. There is a support at the bottom of the jig that projects almost to the 3/4. I’m afraid that the blade will hit the jig if I ran it through.
Is it possible that the jig that I bought cannot make a taper of 3/4 inch?

Ron Sanzone
619 642 0533