I was told by IRCC to declare my travel history in regards to my citizenship application. I entered all the dates of my travel in the physical presence calculator. I have visited India four times, Italy twice, and Mexico. These visits were of very short period of time. I did not mention about my travel history due to work with USA as I enter USA same day and return to Canada same day. What should I mention further about my travel history in context to letter received by IRCC?
You need to mention about USA travel history, Even if you enter Canada on the same day. You can fill a new physical presence calculator, with every exit and entry to Canada. If you are not sure with which dates to put on, you can order your travel history dates from USA. Put approximate dates of entry to Canada. This way you can response the further information requested by IRCC.