I've never used Netbeans but I found a help page for integrating Subversion at
https://netbeans.org/kb/docs/ide/subversion.html. One of the main things seems to be to specify the path to the Subversion command line executable. Perhaps that's the problem you're having.
As you're asking this on a TortoiseSVN group, rather than a Subversion group, I'll assume that you've installed TortoiseSVN. The first thing is to ensure that, during installation of TortoiseSVN, the option to install the "Command line clients tools" was selected. You can check this by re-running the TortoiseSVN installer and selecting the option to Modify the installation. This can be initiated from the Windows "Add or remove programs" settings applet.
The default installation path is
<C:\Program Files\TortoiseSVN\bin>, although that might be different on your system. That folder should include the
svn.exe command line application. This would seem to be the path that the Netbeans configuration requires, as described in the Netbeans help.
If this information doesn't help, perhaps you could post more specific information about the problem so that others with specific Netbeans experience may be able to contribute suggestions.
Hope this helps.