  We exploit the techniques of Bonora-Tonin superfield formalism to derive the
off-shell nilpotent and absolutely anticommuting (anti-)BRST as well as
(anti-)co-BRST symmetry transformations for the (1+1)-dimensional (2D)
bosonized vector Schwinger model. In the derivation of above symmetries, we
invoke the (dual)-horizontality conditions as well as gauge and (anti-)co-BRST
invariant restrictions on the superfields that are defined onto the (2,
2)-dimensional supermanifold. We provide geometrical interpretation of the
above nilpotent symmetries (and their corresponding charges). We also express
the nilpotency and absolute anticommutativity of the (anti-)BRST and
(anti-)co-BRST charges within the framework of augmented superfield formalism.
