Regarding the tax information, all you really have to do is follow the steps when you set up your tax information under "my earnings". Here are some links from HubPages that might help you: https://hubpageshelp.com/money/Learning-Center-hub... : this is from the learning center and is all about "How to Sign Up for the HubPages Earnings Program".
https://hubpages.com/faq/#whytaxinfo - this is from the HubPages FAQ and it answers questions about tax.
If you still have questions about tax information, maybe you can contact HubPages for more clarifications. You can do that by clicking on the "help" link at the top of any HubPages page. Here's the link for that: http://hubpages.com/help-wizard/ . From that page, you can just select "the type of problem" that you want to contact HubPages about. Hope this helped.