Yes, Doteasy provides domain renewal services for the following country level domains: .ca, .us, eu, .uk, .tv, and .co.
If your domain is currently registered with another service provider, you'll need to submit your domain renewal request as a Transfer Registrar request.
You can renew your domain with Doteasy by logging into Member Zone, and clicking on the "Renew Domain" or the "Transfer Domain to Doteasy" link under the "Domain Settings" section. If you're logging into your Master Account, you will need to click on the domain name first before you can see this option.
Once you're in, you can then follow the on-screen instructions to complete the renewal.