Please see the image below to find the RRSP calculator in your return.

Thank you for choosing TurboTax.

the screenshot is from last year's application - the detailed 'section' list is not showing this year.

How do I get back to the RRSP Donation Calculator/Slider

@Gord7 In the TurboTax Online new look, this year everything you need will be in your Tax Home (on the left side menu). 

From Tax Home, you will have access to everything in your return, knows where you are in the process (under To Do), add topics and edit them (see screenshot).

Thank you for choosing TurboTax.