I'm building a custom report using google analytics, a report that has 3 different tabs.
I want to apply a different filter to each tab but when I change the filter in any of them, it automatically changes the filter in the other tabs.
Is there a way of doing this or do I necessarily need to create another custom report to apply different filters?
Unfortunately not. Creating a Dashboard will allow you to have all your reports - with their individual filters - in one place.