Corporations must file tax returns in all U.S. jurisdictions imposing an income tax. Such returns are a self-assessment of tax. Corporate income tax is payable in advance installments, or estimated payments, at the federal level and for many states.
An ashen skin color is a result of inadequate oxygen circulation or perfusion.
Skin Diseases That Cause Dark Spots. 1  Melasma: Itâs one of the commonest causes of grayish patches on the face. It mostly affects the forehead, cheeks, or the area between your mouth and nose. 2  Riehlâs Melanosis: It causes grayish or brownish patches on your face resulting from hyper-pigmentation.