What tax year? Did you receive a letter or notice from the IRS? If so, what is the notice or letter number, located in the upper right corner of the first page, usually preceded by either a CP or LTR?
Did you purchase Max Benefits which includes Audit Defense? If so, did you receive your membership info in an email? See this TurboTax support FAQ for Audit Defense membership - https://ttlc.intuit.com/community/using-turbotax/help/when-will-i-get-my-audit-defense-membership-info/01/26174
If you did NOT purchase Max Benefits or Audit Defense then use the TurboTax Audit Support Center to assist you in understanding the IRS letter or notice you received - https://support.turbotax.intuit.com/irs-notice/audit-support/