Income Tax returns can be filed an infinite number of times; however, if the original income tax return is filed on paper, then the revised return cannot be filed electronically or online. Moreover, The Income Tax Department do not charge any fees or penalty for the revision of income tax return. If ITR is to be filed online, the taxpayer must fill in the 15-digit acknowledgment number of the primary return. Additionally, it is to be noted that if the revised return is filled too many times, it might attract scrutiny from the Income Tax Department.