CSV File Format for import

What is the csv file format Turbo Tax Deluxe download version requires? I need to generate my own file in order to import hundreds of entries, however I cannot find the file format Turbo Tax requires. To do this I need the file format specification including which columns are required, what to name the header row, etc., plus an example csv file.  

 

There are posts stating how to download a csv file from another service, but that does not help me since I need to generate the csv file myself.

 

Thank you