A corporation, for example, is a living, breathing “entity” under the law. It has it's own social security number, more commonly known as your Federal Employer Identification Number. It does it's own business. If the Corporation has a problem paying it's bills, then the owner can not be held responsible for those bills, unless they can pierce the corporate veil. But it's income and expenses must be kept separate from other entities.
You cannot deduct one company's expenses, on another one's income tax return. You cannot deduct your personal expenses off of the corporation. If you commingle funds, you are committing tax fraud. In doing so, you will pay additional tax, interest, penalties, and in extreme cases face jail time.
If you are asking this question in the first place, then its time for a new accountant. Call our offices today. The Special Accounting Packages section of this website may have an offer which will benefit you. If you have a new business, an audit, need returns prepared, or simply want a second opinion, we can help. As highly recommended tax accountants practicing in the Chicagoland Area, we have the experience necessary to help your company. Simply call or e-mail Accounting Solutions today.