The Goods and Service Tax Network has enabled a New Column on GST Portal to file a Pre-Fill an Application Form for a refund. There are certain mandatory filed to be filled by the taxpayers such as:

1. Aadhar Number.
2. Income tax paid in Financial Year 2018-2019.
3. Capital Expenditure and investment made in Financial Year 2018-2019.
4. Advance tax paid in Financial Year 2019-2020 (till date).

Source : http://www.a2ztaxcorp.com/gstn-has-enabled-an-option-to-file-refund-pre-application-form/