In order to explain what this means, I am including here a snippet from the IRS understanding your CP05 notice below. Please read the brief article for more information.
Why is my return being reviewed?
While most returns are accepted as filed, some are selected for examination. The IRS examines some federal tax returns to determine if income, expenses, and credits are being reported accurately. The IRS selects returns for examination using various methods which include random sampling, computerized screening, and comparison of information received by the IRS such as Forms W-2 and 1099. Having your return selected for examination does not suggest that you made an error or were dishonest.
