I am sorry to hear that you are having this problem. Please double check your code as they usually have 6 digits. If the code that fits you best is only 5 digits, add a zero to to the end. Example: Soybean Farming is 11111, so in TurboTax you would put 111110.

You can look up your industry code using the documents on the CRA website: https://www.statcan.gc.ca/eng/subjects/standard/naics/2017/index

Or you can use the search tools on the NAICS website: https://www.naics.com/search/