Yes, If you’re using the online edition of TurboTax, it's possible to delete a return that hasn’t been filed. Returns that have already been filed (either by NETFILE or printed to mail) can't be deleted.

As a general rule, you should never be charged more than one time per return filed. However, there are some scenarios where you may be prompted to pay for additional features or services, Why am I being asked to pay twice for my return in TurboTax(online)? 

For more information, please read our TurboTax FAQs:

How do I delete a return in TurboTax Online? (intuit.ca)

How do I start a new tax return in the online edit... (intuit.ca)

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