How do I change my monthly ROKU subscription to an annual one. I can't find the capability anywhere on the web site.
When you say "monthly ROKU subscription" I hope you mean a subscription to a particular channel. If you're being charged a monthly subscription just to use your Roku you're getting scammed.
Thanks for the inquiry.
As @renojim mentioned, there is no subscription fee for using Roku devices. If you are referring to subscriptions to channels on the Roku device, you will need to contact the channel provider for more information about annual subscriptions plans.