My 2019 INCOME TAX AND BENEFIT RETURN was returned by CRA because ".. we are accepting the prescribed format of seven or eight pages for a T1 General Condensed return."?

If you mailed in your income tax return, you would have had to click on print to mail and you would have got the condensed version to mail to CRA.  

where is the print to mail option     using the cd version of turbotax

When you go through Review - you will come to the following page

Click on I want to print and mail my return