how do i delete files from icloud without deleting locally from my computer

If you have iCloud Drive turned on in your Mac but do not have the Desktop & Documents option for iCloud drive turned on, move them out of the iCloud Drive folder on your Mac. Open a Finder window, click the "Go" menu in the menubar and click iCloud Drive on that menu. Then move the files that you no longer want in iCloud Drive to another folder.

If Desktop and Documents option is on and you want to leave it on, do the same as above but move the files to a folder other than iCloud Drive or Desktop or Document. You can create a new folder under your Home (username) folder if you want.

If you have the Desktop and Documents option turned on and want to turn it off, see the following from Add your Desktop and Documents files to iCloud Drive - Apple Support

When you turn off Desktop & Documents Folders, your files stay in iCloud Drive and a new Desktop and Documents folder is created on your Mac in the home folder. You can move files from iCloud Drive to your Mac as you need them, or select all of your files and drag them to the place you want to keep them.

1. From your Mac, choose Apple menu  > System Preferences. Click Apple ID, then click iCloud. On macOS Mojave or earlier, choose Apple menu  > System Preferences, then click iCloud.
2. Next to iCloud Drive, click Options.
3. Deselect Desktop & Documents Folders.
4. Click Done.

If you turn off iCloud Drive or sign out of iCloud, you have the option to keep a local copy of your files that are in iCloud Drive. Whether you decide to keep a local copy or not, a new Desktop and Documents folder is created in your home folder. If you choose to keep a local copy, your files in iCloud Drive are copied to a folder called iCloud Drive (Archive) in your home folder. Then you have the option to move any files that were in your iCloud Desktop and Documents, back to your new local Desktop and Documents.