TurboTax online free version does not have related fees. In this case, you perhaps were choosing either an additional TurboTax service, getting the TurboTax Premier, or clicking on an upgrade while completing your return. In this case, it is recommendable to start over in the free addition. To do so, you will need to go to the following link to start your return: https://turbotax.intuit.ca/tax/software/personal/online/free
Please make sure that you do not click on any upgrades as you are completing your return.
Thank you for using TurboTax