No, you are not in trouble. Sometimes IRS needs to further review your return to verify items such as:
- The income you reported on your return
- The income tax withholding amounts you reported on your return
- The claims for tax credits you made on your return
- The withholding claimed on your Social Security benefits
- The household help you claimed
- The Schedule C income you claimed
The following IRS link explains the reason you may have received this notice and provides guidance about when you can expect to receive your refund. https://www.irs.gov/individuals/understanding-your-cp05-notice
