For example, a physical therapist in Reno, Nevada may find that his special area of interest is prevention of injuries in high school students involved in team sports and he may set up a private practice teaching adolescents and adults stretching and strengthening techniques and conditioning routines.
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A: The Internal Revenue Service's assistance number for individual taxpayers is 800-829-1040, and for businesses it is 800-829-4933. Other customer service numbers are as follows: for exempt organizations, retirement plan administrators, and government entities, 877-829-5500, and for the hearing-impaired, 800-829-4933.