The year 2025 is about to end. Deadlines for various important finance and banking tasks are also approaching. If you fail to complete these tasks within the stipulated timeframe then you will be required to pay some penalties. Among the key deadlines are filing a belated ITR amending your original ITR establishing a bank locker agreement and linking your PAN to your Aadhaar. If you filed your original ITR by September 16 but later noticed an error you will have the opportunity to fix the error. To amend/ revise an ITR taxpayers must do so by December 31. The deadline for filing your Income Tax Return (ITR) was September 16 2025. If you did not file your ITR by this deadline you can file it until December 31 as by submitting a belated return. All taxpayers who do not meet their original deadlines will pay an additional penalty under Section 234F of the Income Tax Act along with interest under Section 234A. As a result taxpayers will incur an additional financial burden from not having met the original deadlines. If you filed your ITR before September 16 and realised later that you omitted something or made an error you are still able to correct it. According to the NavBharat Times Hindi report Taxpayers have the option to file a revised return in these cases. A revised return allows for the correction of errors made on the original return and must be filed within 3 months of the end of the relevant accounting period (i.e. by December 31) or as soon as the tax authorities complete your assessment whichever occurs first. There is no penalty or late fee associated with the filing of a revised return; however if the revised return results in an increase in tax liability you will still be obligated to pay the additional tax due and any applicable interest charges. The last date to submit GST Annual Return (GSTR-9/9C) for Financial Year 2024 - 25 is the December 31 2025. No extension has been announced till yet by any governing body although a number of professional bodies have submitted requests for extensions. In addition companies have until the December 31 2025 to submit their Annual Return and financial statements (Form MGT-7 and AOC-4) for the financial year 2025. The government has set December 31 2025 as the final date to link PAN and Aadhaar cards. Failure to do so results in the inoperativeness of the person’s PAN card; thus the individual will not be able to file their Income Tax Returns or other tax-related activities until they have met the above requirement.  According to the Central Board of Direct Taxes (CBDT) those individuals who possess an Aadhaar card obtained on or before October 1 2025 will have to link it to their respective PAN cards before December 31 2025. If an individual fails to link their Aadhaar and PAN cards then all services will be suspended through the Income Tax Department on that PAN. If you have a bank locker then you will also need to complete a updated rental agreement with your bank in order to remain able to access the locker. If you do not complete and return this new rental agreement to your bank you will lose the ability to access your bank locker. According to media reports the deadline is December 31 despite having been extended multiple times previously.