As in autosomal recessive inheritance, two copies of a disease allele on the X chromosome are required for an individual with two X chromosomes (a female) to be affected with an X-linked recessive disease.
The form 1098-T is used by the student or whoever pays the qualified tuition or educational expenses to claim a credit to taxes filed on IRS Form 1040 or 1040-A. The form will show the student's name, address, social security number and other identifying information.
The first Form 1040 was published for use for the tax years 1913, 1914, and 1915. For 1916, Form 1040 was converted to an annual form (i.e., updated each year with the new tax year printed on the form). Initially, the IRS mailed tax booklets (Form 1040, instructions, and most common attachments) to all households.