  We present a brief introduction to the Dyson-Schwinger equations (DSEs)
approach to hadron and high-energy physics. In particular, how this formalism
is applied to calculate the electromagnetic form factors $\gamma^* \gamma^* \to
\textbf{P}^0$ and $\gamma^* \textbf{P}^\pm \to \textbf{P}^\pm$ (with
$\textbf{P}^\pm$ and $\textbf{P}^0$ charged and neutral ground-state
pseudoscalar mesons, respectively) is discussed. Subsequently, the
corresponding contributions of those form factors to the muon anomalous
magnetic moment ($g-2$) are estimated. We look forward to promoting the DSE
approach to address theoretical aspects of the muon $g-2$, highlighting some
calculations that could be carried out in the future.
