The most useful function for me is that it helps in controlling my tax liability by providing detailed calculations at each stage (i) calculation of advance taxes; (ii) payment/claiming of Advance Tax Refunds; (iii) submission of annual return with details of claim amount etc.; (iv) timely reporting status online as well as through emails. I like its interface which makes things easy even if one does not have much technical knowledge about accounting software. Nothing so far but this can be improved further by adding more templates along side some pre-built reports. This saves lot of time while preparing returns or submitting claims.