I received a letter saying I was under a review and it could take up to 60 days this is my 5th year using TurboTax and never had this before any information out the

[HelenC12]

This is quite common. Your return is probably 100% correct but the IRS can do "reviews" or "audits" any time they want. TurboTax has no control over what the IRS does. 

The IRS has several different methods for a review:

• Random selection and computer screening - sometimes returns are selected based solely on a statistical formula. The IRS compares your tax return against “norms” for similar returns. The IRS develops these “norms” from audits of a statistically valid random sample of returns, as part of the National Research Program the IRS conducts. The IRS uses this program to update return selection information.
• Related examinations – The IRS may select your returns when they involve issues or transactions with other taxpayers, such as business partners or investors, whose returns were selected for audit. 
• To read the entire IRS article, click here.