Retirement tax questions

Hello:

I just noticed if I use the Treasury Department Exchange rate for the Canadian pension income, it will make my income a lot higher than the true pension income we received.  The exchange rate on the Treasury Department website is around 1.28, but the average rate of the pension payments is around 1.74.  Should I  just report the actual total US dollar amount that deposited in my bank account  because this  is the truly payments that I received in 2020?  Please advise, thanks.