Are you using a laptop or a keyboard where the F-keys have other function attached to them? If that is the case, your F10 key might be doing something that TurboTax doesn’t understand, instead of acting like an F10 key press. Look on the keyboard for an FN or F Lock key – that button switches the F-Keys between whatever function they are currently programmed to do and “old fashioned” F-Keys.
This third party website has some more info on Function Keys: https://www.computerhope.com/issues/ch000306.htm
If this doesn’t resolve your problem or you need further assistance, please contact us by phone for more help.
To talk to our phone support team, visit https://support.turbotax.intuit.ca/contact/ . After entering some basic info about what you need help with, the page will give you the correct phone number to call.