Business Formation

Generally your freelance job will issue you 1099-MISC slips for earnings more than $600.
The gross amount of your freelance jobs should be reported on IRS Schedule C along with the corresponding expenses. The net amount of this business income is subject to Federal tax and Social security taxes.
The federal tax will be calculated on the tax bracket you fall into Also, the net amount of your business multiplied at .9235 multiplied at .133 will equal your social security tax.
If wages exist the social security tax may be reduced.
This calculation is done on IRS Schedule SE.
The net business income will be subject to state tax depending on your state.
Speak to your local CPA about the tax consequences of your freelance job(s).

Incorporation can provide many benefits. The most important factor is that incorporation can help limit your personal liability as a business owner. Generally, creditors of your corporation must satisfy their claims by seizing the assets of the corporation rather than your personal assets. In contrast to a sole proprietor or partner in a partnership, you are financially responsible for all liabilities of the business, and your personal assets are subject to seizure or lien by creditors. Other benefits of incorporation can include greater tax deductions for health insurance and medical expenses, lower payments for social security tax and medicare tax, and greater opportunity to raise capital for the business through the issuance of stock.

Interest Rates for Q1 and Q2 2012 will continue to be charged as follows:
3% for overpayments (2% for corporations)
3% for underpayments
5% for large corporate underpayments
0.5% for the portion of a corporate overpayment in excess of $10k.
Under the Internal Revenue Code, the rate of interest is determined on a quarterly basis. For taxpayers other than corporations, the overpayment and underpayment rate is the federal short-term rate plus 3 percentage points. Generally, in the case of a corporation, the underpayment rate is the federal short-term rate plus 3 percentage points and the overpayment rate is the federal short-term rate plus 2 percentage points. The rate for large corporate underpayments is the federal short-term rate plus 5 percentage points.
The rate on the portion of a corporate overpayment of tax exceeding $10,000 for a taxable period is the federal short-term rate plus one-half (0.5) of a percentage point. Further, the federal short-term rate that applies during the third month following the taxable year also applies when determining estimated tax underpayments during the first 15 days of the fourth month following the taxable year

DBA is an acronym for "Doing Business As". It is also known as a Fictitious Name. Most states require that sole proprietorships and partnerships that are conducting business under a name other than the owner(s) must file for a DBA certificate in the county where business is conducted. The DBA certificate is generally obtained at the Clerk of Court of the county in which business will be conducted. Fees are typically between $100 and $225 and most courthouses have records that may be searched to determine if your suggested name will be unique.

No. The tax year of a partnership closes when a partner's entire interest in the partnership is sold or terminated.

Some advantages are that it avoids certain S corporation restrictions. It also avoids double taxation of profits.
Some disadvantages are that it is currently considered a relatively new business entity with little case law or regulatory law currently available.
There is inconsistent treatment from state to state. The entity must have at least 2 owners.
Speak to your local CPA about determining the best entity choice to fit your needs

An advantage is that it is a way to combine the financial abilities and skills of several different people. Some disadvantages are that the general partners are liable for the actions of the other partners and a partnership is not that easy to get out of. Speak to your local CPA about selecting the best entity for your purposes.

Some advantages are: there is limited liability; and the entity avoids double taxation of profits as is the case with C Corporations.
The profits that are passed through to the shareholders are not subject to SE tax as in a partnership.
Some disadvantages are: that the shareholders pay tax on earnings even if they are undistributed; the contributions limits to a qualified retirement plan are based on shareholder/employee wages, not the overall profits as with a Sole Proprietorship.

Some advantages are: it has minimum legal restrictions; and is easy to discontinue. Some disadvantages are: unlimited liability; your income tax cannot be deferred by retaining profits; and you may not bring in new owners or outside capital contributions. Speak to your local CPA to determine the best entity choice for your needs.