ITR Validation Rules for A.Y.2015-16
The Income Tax Department has provided free return preparation software in the downloads page as well as facility for online ITR submission for ITR 1 & ITR 4S which are fully compliant with data quality requirements.

However, there are commercially available software or websites that offer return preparation facilities as well. In order to improve the data quality received through in ITRs prepared through such commercially available software, various types of validation rules are being deployed in the e-Filing portal so that the data which is being uploaded can be validated to a large extent.

Taxpayers are advised to review the same to ensure that the software that is used is compliant with these requirements to avoid rejection of return due to poor data quality or mistakes in the return. Software providers are strictly advised to adhere to these rules to avoid inconvenience to the taxpayers who may use their software.