When you receive a letter from the IRS it is best to carefully read the letter and follow the instructions as quickly and completely as possible. Each letter will have an 'identifying number' (CP-xxxx) on it. You can call the IRS and ask for more information or you can Google that form number for additional information.
The letter will explain the reason(s) the IRS has for increasing the amount you owe. It will also include steps you must follow promptly if you agree with their explanation, or if you disagree with their explanation.
Remember, timeliness is important. Interest and penalties keep accruing.
