  We report on our computation of the pion transition form factor ${\cal
F}_{P\rightarrow \gamma^*\gamma^*}$ from twisted mass lattice QCD in order to
determine the numerically dominant light pseudoscalar pole contribution in the
hadronic light-by-light scattering contribution to the anomalous magnetic
moment of the muon $a_\mu =(g-2)_\mu$. The pion transition form factor is
computed directly at the physical point. We present first results for our
estimate of the pion-pole contribution with kinematic setup for the pion at
rest.
