When I hit OK, TT launch is aborted. I don't have another account, so not sure what to do. Was in the middle of my return.
Try clearing your cookies and/or switch browsers. And if you are using Windows make sure there is no uninstalled OS update ... run the updater and reboot the computer at least 3 times.
"switch users" when using the online version could mean you have the program running under a different user like the administrator ... check your users to close them.
I struggled with this problem for a week before I I stumbled on a work-around. Click on the File Explorer icon on the bottom of your Windows screen. In the search field in the upper right, type Turbotax. With luck, that search will show the Turbotax icon on the top of the responses. When I click on that, I'm in Turbotax with my file open. (Getting into Turbotax this way didn't fix the original problem. This work-around is still the only way I can get into Turbotax.)
Thank you for providing that workaround. If you still need assistance, please contact customer support through the link below.
How do I handle the following Error 70001 "TurboTax is already running under another account. Switch users and run TurboTax from the other account to continue."
To resolve error 70001, please follow the instructions in the TurboTax FAQ below:
Please help me how to get into the Turbo Tax 2024 program when a pop-up box reads: Turbo Tax is already running under another account. Switch users and run Turbo Tax from the other account to continue. Error 70001.
Error 70001 occurs when you have two instances of TurboTax running. In order to correct this error, you may need to manually uninstall and reinstall TurboTax. If doing that does not assist, please follow the steps in this link to troubleshoot the issue.