I need to make changes to my federal income tax. Can you help me?

I have filed my federal taxes for 2017 with tubo tax but need to make changes.  It has not been filed,
PaulGLO
New Member

After you file

You can start over by using the Clear and Start Over feature at any time before you e-file, register a free product, pay for TurboTax by credit/debit card or had your TurboTax fees deducted from your return. 

https://ttlc.intuit.com/replies/4248526