Similar to Orv except our mail is through Alternative Resources in South Dakota.
www.alternativeresources.net should have some helpful information for you. Some things we pay online (e.g. credit cards). Some we pay by mail (e.g. doctor bills). Some are drafted to our checking account (truck payment). Our bank also has pay by phone as well as online.
Taxes. I file federal online (turbotax) but you could just as easily do it by mail. South Dakota has no state income tax so we don't have to worry about that. Otherwise, if you have mail forwarding you should get your tax forms by mail.
Rx. Just take the empty rx bottle into your nearest friendly pharmacy and ask them to transfer the prescription. At Walmart we usually walk out with the rx in 15 to 45 minutes. Occasionally it takes longer if the other pharmacy is not open. It does not have to be the same pharmacy chain.
Don't hesitate with questions. That's why we are here. As CanDo said, there is much information in the archives. And you can always ask here.