Ordinary light incident on a glass slab at the polarizing angle suffers of deviation of 22 degree the value of angle of reflection ?

now what I thought is that when polarization take place the Brewster's law is valid and

$tan\theta_p=\mu $ where $\mu=$ refractive index of slab

and if its a glass slab so it would be 1.5

and since polarizing angle is same as angle of incidence then using brewster law it should come 56 degrees but that comes out to be wrong , then how to do this?