The report includes, among other things: Form 24A to Election Commission | Acknowedgement by Income Tax of the party's 2017-18 tax return
Annual report 2016-17 (PDF- 10 MB | Word 25 MB) (see also this blog post). This report includes the party's returns to the Election Commission and acknowledgement of the Income Tax (copy of the acceptance of the party's 2016-17 Income tax return).
Acceptance of the 2015-16 return by Income Tax Department. Use this password to open the file: aalas5994h16062014