For preparation of your income taxes with speed and accuracy, consider one of the following income tax software packages...
This publisher of income tax preparation software has inexpensive editions designed for small business owners. They even have a free version available. TaxACT is available in both online and desktop versions.
In addition to the walk in service they are famous for, H&R Block also offers income tax software.
Be sure to consider the leader in income tax software. Along with various business versions, Intuit offers a free version of TurboTax.
If you are a professional tax preparer, take a look at software from TaxWise.