  Within the Standard Model Effective Field Theory framework, with operators up
to dimension 6, we perform a model-independent analysis of the
lepton-flavour-violating processes involving tau leptons. Namely, we study
hadronic tau decays and $\ell$-$\tau$ conversion in nuclei ($\ell=e,\mu$).
Based on available experimental limits, we establish constraints on the Wilson
coefficients of the operators contributing to these processes. The related
information from Belle II and foreseen future experiments can be easily
incorporated into the resulting framework.
