Trained volunteers with the AARP Tax-Aide program will help Douglas County residents prepare their taxes until April 15. AARP membership is not required and clients of all ages are eligible for the free assistance. Nearly 30 Douglas County volunteers participate. They are available at locations around the county. Tax help is available 10 a.m. to 3 p.m. Tuesdays through Saturdays at the Roseburg Valley Mall, 1444 N.W. Garden Valley Blvd.; 9 a.m. to 4 p.m. Mondays at the Winston Community Center, 440 Grape Ave.; 10 a.m. to 3 p.m. Mondays at C. Giles Hunt Library, 210 E. Central Ave., in …