You can know somebody who did not pay their taxes with far in years, however with the constantly increasing rate of data processing, it is better if you come into contact with the IRS before they contact you.
If you request a reduction of penalty, you will have to prove a legitimate ground not to pay your taxes. If you do not pay your taxes, all can be risky, like a reduction in payment of work, social security or pension. They are good reasons to start to classify your taxes.
