Can we delete ongoing return as I started with Turbotax online option instead Filing for first time.

Yes. If you want to start over, select “Start a New Return” from under “My Returns” in the left side menu. If you want to delete the unwanted return, select "View all tax returns" from under "My Returns", and delete the unwanted return by clicking the small trash can next to it (in the right side of your screen).

Note: If you only have one return, you'll need to start a new return before you can delete the existing return.

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Thank you very much!! helped me solve an issue