Most notices come from mismatches, not evasion
Most GST notices come from mismatches, not from evasion: input credit claimed that a supplier never uploaded, or a return filed from the books without reconciling against the portal first.
We reconcile before filing rather than after a notice arrives, chase the suppliers whose returns are missing, and file with days in hand instead of hours. It is a duller way of working and it produces markedly fewer problems.