The IRS sends taxpayers millions of notices per year. Whenever you receive correspondence from the IRS you should read it carefully and attempt to understand what the IRS is trying to tell you. This can be difficult because some notices are unclear to those who do are not familiar with tax laws or IRS procedures.
IRS notices can be informational, such as when you are notified that your tax return is going to be adjusted. However, you may still disagree with this notice, and you can attempt to take action to dispute the mistake by the IRS.
Other notices will warn you that the IRS is about to take a specific action. This could a Notice of Intent to Levy, which means that the IRS is about to seize some of your assets, including the funds in your bank account or a state tax refund. Another common notice is the Notice of Deficiency, which states that the IRS is planning to assess a tax liability against you, and gives you one last chance to dispute the amount in Tax Court before the IRS begins to collect it.