While using TurboTax, if you encounter an error message 1921, then there are many solutions to solve this error code. Here you will find how to fix TurboTax error 1921. The foremost solution is to restart your system and then check your software again. If this does not solve the error code, open the Task Manager and end all the running tasks, including TurboTax, and exit from it. Then, again restart your system, open TurboTax, and check the issue to get resolved.
