Tax Return Assistance If you require assistance filing your 2017 tax return, please join Capitol Hill Care Link on Fridays from 10 a.m. to 2 p.m. through April 13th. AARP trained volunteers will be here to walk you step-by-step through filing your taxes. Service is available on a first-come first-serve basis. Capitol Hill Care Link is located at The Center, 1301 E. Colfax Ave., Denver, CO 80218. Please call 303-733-7743 with any questions or visit www.capitalhillcarelink.org for more information.