TT600 means that something has been input that TurboTax cannot understand or has not been programmed to accept. If you are trying to put in your industry code, try searching for it using this link, and then just type the number that you found into the program. https://www.statcan.gc.ca/eng/subjects/standard/naics/2017/v3/index

TT600 error FAQ: https://turbotax.community.intuit.ca/replies/2647802

What is the industry code

Unfortunately, we can't give you the code required since we do not know what type of work you do specifically. You can contact our customer service for assistance.

Error code tt600

@2739 TT600 means that something has been input that TurboTax cannot understand or has not been programmed to accept. If you are trying to put in your industry code, try searching for it using the NAICS 2022 website, and then just type the number that you found into the program. 

Please visit the NAICS 2022 website here: https://www23.statcan.gc.ca/imdb/p3VD.pl?Function=getVD&TVD=1369825