So when you answer question 21 obviously check NO for any travel in last 5 years and submit your application.
Also check YES for question 23 to give IRCC authority to check your travel history directly with CBSA. Also check YES to question 24 for IRCC to check your tax records if they need to,
Should they come back asking for travel proof you could apply for CBSA travel history yourself through link below
https://www.cbsa-asfc.gc.ca/agency-agence/reports-rapports/pia-efvp/atip-aiprp/thr-rav-eng.html
Where people often have issues tends to be the photos so make sure they meet the specification to avoid delays.