The electric field dependence of the dielectric properties and the nonlinear conductance of 1T-TaS2 below 50 K has been investigated. A large dielectric constant of about 10(4) is obtained up to 10(7) Hz, which cannot be attributed to hopping of the localized carriers alone, the collective excitations of the commensurate charge-density-wave must be another contributor. The dielectric spectra disperse slightly in our measured temperature and frequency range. At a moderate dc bias field, the real part of the dielectric constant epsilon(1)(omega) decreases. We propose that the separation of bound soliton-antisoliton pairs may be a contributor to the reduction of epsilon(1) (omega) and the accompanying nonlinear conductivity with increasing dc bias.