During Tax Season (January 23 to April 18), if she is unavailable to contact with on the phone, she can simply be reached via e-mail at automatedtaxservices@gmail.com. All e-mails are replied the same-day. Or Leave her a voicemail, by calling (301) 248-3878 press *, Mailbox Number (301) 248-7684.
Via email is the fastest way for her to respond.