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.
Dark spots, patches or other marks found on the face can be due to excess secretion of melanin found on the skin. Some of the factors that might cause this condition is over exposure to the sun, hormone imbalance, pregnancy, vitamin deficiencies, lack of sleep and even too much stress.