I received $8866 in unemployment benefits but it show $17732 why

It sounds like you duplicated the entries.  You can delete the 1099-G entries and re-enter.  If deleting them from the summary screen does not get rid of the duplication, then you can delete the 1099-G in the delete a form section. 

1. From the left rail menu in TurboTax Online, select Tax Tools (You may have to scroll down on the left rail menu.)
2. On the drop-down select Tools
3. On the Pop-Up menu titled “Tools Center,” select Delete a Form 
4. This will show all of the forms in your return
5. Scroll down to the form you want to delete
6. Select the Form
7. Click on Delete. 

Always use extreme caution when deleting information from your tax return.  There could be unintended consequences.