How can I remove Stock, Mutual Fund, Bonds section which I added by mistake?

[TerukoL]

You can log back into your account to make changes anytime prior to filing your return.  

• Click Tax Home on the left-hand menu. 
• Click Federal (or State) and you can navigate through the different sections of your return using the top menu links (Personal, Deductions and Credits, etc).

If you have already e-filed (or mailed) your return, you will need to wait until your return is either accepted or rejected to make changes.

Please How do I preview my TurboTax Online return before filing? to learn more.