Here's a reference for all the support pages you can find about Expert Testing (formerly BugFinder).
What is Expert Testing?
Who can submit websites for testing?
Who can see my Expert Testing Project?
How do I submit a website for testing?
How do I edit my Project on Expert Testing?
How do I find a website to test?
How do I see the Bugs that have already been reported on a Project?
A Guide to Projects on Expert Testing
How do I close my Project on Expert Testing?
How do I submit a Bug to an Expert Testing Project?
How do I edit a Bug I posted?
How do I close a Bug on my Project?
Can I re-open a closed Bug that was posted on my Project?
How do I find my Expert Testing Projects?
How do I see which Projects I’ve participated in?
How do I find a Bug that was posted on a Project?
How do I monitor a Project or a Bug?
How can I be notified if a new Project is posted?
Can I earn points by posting bugs on Expert Testing Projects?