I received a letter stating my refund was under review. I know all my information was correct how long should i expect to receive my refund now?

[MicheleR]

There is no way for TurboTax to give you a timeline concerning when you will receive your refund. The processing of your refund may be delayed until the review is complete. Once the review is complete, the IRS will make the necessary adjustments, If Any, and issue your refund accordingly.

If you received a CP05: The IRS encourages taxpayers to wait at least 45 days from the day you receive the CP05 notice to follow up on the status if you haven't yet received your refund. Use the number found on the notice to ensure you are routed to the correct department. 

Please see the IRS website Understanding Your IRS Notice or Letter for more information.

*NOTE: If your return is flagged for review, remain calm. Cooperate with the IRS (if they request additional documentation) to ensure your return is processed in the most seamless and rapid manner possible.