The error code 1921 usually occurs because of background processes which slows the computer down and defects the system. If you want to solve this error, you will have to perform some steps that will help you answer the question how to fix TurboTax error 1921 instantly. The steps have been given here. The first thing that you should do is close all the programs. Then restart your computer. After that reopen TurboTax and try updating again. Alternatively, you can also try by going to the Control Panel. Then open Administrative Tools and choose Services. Then, you have to right-click on Intuit Update Service and click on Stop. Then, reopen TurboTax and try updating it again.
