Hi you suc k,

You can only click the View menu and select the Hide Icon Bar at the top menu to remove the icon bar. Once done, this will remove the search bar. I've attached screenshots for visual guide.

As mentioned by JamesDuanT, you can perform the troubleshooting steps if the icon bar will show again in QuickBooks Desktop.

For future reference, I have these help articles for more information about QuickBooks: Help Articles in QuickBooks Desktop. Help Articles in QuickBooks Desktop

Keep me posted if you need anything. I'll always be here to help.