You do not need to do your return over again. You just need to log into your 2019 return and correct that area that caused the IRS rejection. Once this has been corrected you will be able to submit the return again.
TurboTax is saying to update the software and refile. There are no updates, so nothing is changing, so IRS rejects return again. Has the IRS approved accepting TurboTax form 1065?
Yes. Form 1065 is now showing available for print and e-file. Here is a link to the availability link. Business Forms Availability
Be sure to check other forms in your return to ensure they can also be efiled.
If your return is rejected more than 2-3 times and you are unable to correct the rejections, you will need to print and mail your return.
Mailing instructions will print with the return when you go through the print process.