tax return (urgent)

Do I need to write to Sprintax to delete what I started in Turbotax? If so, is there an email address you can give me? I couldn't find it. I am a full-time student and although I tried to reach the IRS by phone, I could not reach them. I think if I can contact them as soon as possible, I can start the cancellation process before the money reaches my account. Thank you for helping.