Retirement tax questions

Thank You HopeS, this is different from the response of MarilynG1 on Feb 4.  She suggested that just report the taxable portion of Canadian RRSP distribution as the net received (after Canadian 25% tax) on 1040 line 5b.  In other words, just deduct the Canadian tax right off .  Please clarify

In the second part of your response, do I have to put anything on the  box "Taxable part of Distribution"

Thank You very much