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.
What causes uneven skin tone? The main causes of uneven skin tone are hyperpigmentation, sun spots, hormones and discolouration due to acne scarring. An excess of melanin or pigment in the skin due to sun exposure creates freckles and eventually, isolated dark spots.