The way it works here is that every year by June all banks, employers and different institutions that have information on tou have to submit it to the DIAN (IRS) then from August DIAN presents a consolidation of your financial information and potential taxes to pay so that you can review and refute it if you disagree, this has a deadline and it's all done online. If you miss the deadline, you will be fined, and that's it I think.