Can I use my earnings for booking services instead of cashing it out? Will I need to file taxes then?

All your Rover earnings are considered taxable income and I'm pretty sure you cannot use your earnings in your Rover account to pay for services on the platform, but you can call support @ [Edit: Rover’s contact options have changed. Visit the Rover Help Center at https://support.rover.com/ to find the phone number, help articles, or chat with the team]