How do I start my tax forms over?

Yes, You can Clear and Start Over to remove data, provided you haven't paid or filed the tax return. 

 Sign into TurboTax.

1. You may have to bring up the additional options on the left sidebar
   1. On the center panel select Personal Info [Continue]
   2. This will bring up additional options on the left sidebar.
2. On the left sidebar at the bottom
3. Select the Switch Products drop down arrow.
4. Click Clear and start over.

You can view the TurboTax Video How do I clear and start over?