The external and internal oblique muscles rotate and side bend the trunk. These muscles also contribute to spinal stability. The external oblique is the most superficial muscle of the three flat abdominal muscles (the external oblique, internal oblique, and transversus abdominis).he external oblique is the most superficial muscle of the three flat abdominal muscles (the external oblique, internal oblique, and transversus abdominis).
IRS Publication 1771, Charitable ContributionsâSubstantiation and Disclosure. Requirements, explains the federal tax law for organizations, such as charities and. churches, that receive tax-deductible charitable contributions and for taxpayers who make. contributions. The IRS imposes recordkeeping and substantiation rules on donors of charitable.
1 The taxpayer must have maintained the records required to substantiate the itemized deductions. 2  If the amounts of the itemized deductions and the standard deduction do not differ much, the taxpayer may take the standard deduction to reduce the possibility of adjustment by the Internal Revenue Service (IRS).