Estimated tax is the method used to pay Social Security and Medicare taxes and income tax, because you do not have an employer withholding these taxes for you. Form 1040-ES, Estimated Tax for Individuals (PDF), is used to figure these taxes. Form 1040-ES contains a worksheet that is similar to Form 1040.
Why It's Done. The main reason doctors order the IGFBP-3 test is for its usefulness as an indicator of whether someone is producing a normal amount of human growth hormone. In this way, the IGFBP-3 test is used to check for pituitary gland disorders and abnormalities in growth hormone production.
What It Is. A hemoglobin A1c (HbA1c) test is used to monitor long-term glucose (sugar) control in people with diabetes. While daily blood sugar testing gives a picture of day-to-day fluctuations, the hemoglobin A1c test offers an overview of how well glucose has been controlled over the past 2 to 3 months.The test assesses the amount of glycated (sugar-coated) hemoglobin in the blood.octors use the hemoglobin A1c test to determine if your child's diabetes management plan needs to be adjusted. Typically the test is performed in a clinical laboratory or the doctor's office and repeated a few times a year.