Assessees, particularly those have some discrepancies in the name or year of birth or any other data between their Aadhar and PAN cards, were not able to submit returns. Besides, the site was also reported to be crashed in between.
"Some people for whom PAN and Aadhaar data was not matching had problems and could not file returns," Neeru Ahuja of Deloitte and Haskins said.
The department said there are some complaints that the taxpayers are not being able to log on to the e-filing website or not being able to link Aadhaar with PAN because of different names reflected in PAN and Aadhaar database.
"While technical snags have been removed already, the main reason for failure of people to log in is because of last minute rush and panic in which those who have already logged in want to continue for the entire period for fear of losing it," it said.
To ease out the panic situation, the department said it would be sufficient as of now to quote Aadhaar or acknowledgement number for having applied for Aadhaar for the filing of e-returns.
The actual linking of PAN with Aadhaar can be done subsequently, but any time before 31st August, 2017, it said. "However, the returns will not be processed until the linkage of Aadhaar with PAN is done," it added.
Electronic filing of income tax returns for 2016-17 grew by 18 per cent up to June.