Bangalore: Generally, income tax returns are filed in the last days without much justification for the same by taxpayers. All the documents and information required for filing return are available nowadays in the month of May/June itself like Form 16, 16A and 26 AS can be downloaded from IT website or bank account any time. In spite of this, most tax returns are filed in the last days. This leads to mistakes in filing the IT returns. The most common mistakes in filing IT returns and ways to avoid them are Mismatch of PAN Details Taxpayers file return with different name i.e. Sita Gupta instead of Sita Aggarwal (as given in PAN card) or file with changed address but not updated same in PAN data. These errors lead to delay in processing of IT returns and refund, if any. How to avoid: One must get his/her PAN details updated if there is change in name , address etc. You can verify the PAN details before filing IT return at https://incometaxindiaefiling.gov.in/portal/knowpan.do