If your federal tax return has already been Accepted, you should wait for a response from the IRS.
TurboTax probably did not include IRS Form 6251, Alternative Minimum Tax - Individuals because it determined you were not subject to the AMT.
If you are not subject to the AMT but the IRS still wants you to file Form 6251, please review the following instructions:
If Form 6251 is included in your federal tax return, please review the following instructions to print:
If those instructions are unhelpful, please review the following link but instead of selecting Take me to my return, you may have to select Add a State under Your tax returns & documents just to get back into the return area: How do I print a copy of my TurboTax Online return before filing?
If Form 6251 is not included in your federal tax return, you could use the amendment software (but not actually amend your tax return(s)). Please review the following link for more information: How to amend (change or correct) a return you already filed?