Income tax revision is the process of correcting errors, omissions, or updating financial details in a previously filed income tax return. It allows taxpayers to rectify mistakes, report omitted income sources or deductions, and accommodate changes in their financial circumstances. Deadlines are usually set for revisions, and adhering to them is essential to avoid penalties or interest charges. The revision process may involve submitting a corrected return or an amendment to the original return, depending on the country's tax regulations. Timely and accurate revisions ensure compliance with tax laws and help prevent potential issues with tax authorities while ensuring the correct tax liability is determined.