I am self employed with no partner, no tax shelter and no GST number. How do I proceed with form T2125 where I cannot progress until these blocks are filled?

These fields are not required fields - you can leave these boxes blank if they don't apply to you. 

If you are still unable to resolve this issue, please contact our phone support team, as they will be better able to assist you. 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 phone number for the team best suited to help.