if you mean changing tabs for when there is a split:
you can go to settings -> keymap -> main menu -> window -> editor tabs and set a shortcut for Goto Next Splitter and Goto Previuos Splitter
if you mean moving between tabs with no split use these:
Linux: alt + left AND alt + right
Windows: alt + left AND alt + right
OSX: cmd + shift + [ AND cmd + shift + ]