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.
An uneven skin tone is most commonly caused by UV rays from the sun, however, age, hormonal changes, chemicals, and pollutants can also cause this condition. Additionally, the body itself too can cause uneven skin tones and blotchy skin by attacking the cells that produce melanin.