We're sorry for the inconvenience.  Please use the following FAQ to contact customer support.

https://turbotax.community.intuit.ca/replies/3152013

Cannot open program getting Error TT457

Please make sure that you have the minimum requirements on your computer to open the software

 https://turbotax.community.intuit.ca/community/product-information/help/what-are-the-minimum-system-...

If this isn't the issue, please contact our customer service for assistance

https://turbotax.community.intuit.ca/community/product-information/help/contact-us/00/873707