What are the advantages of preparing taxes electronically?

There are advantages to the electronic preparation of tax returns. These include:
Increased accuracy. An important benefit of the electronic preparation of tax returns is the reduction of errors. The error rate in electronically prepared returns is significantly lower than that of manually prepared returns.
Ease of use. Tax preparation software is easy to use. Most tax preparation software uses expert systems, known as wizards, to help with return preparation. The wizard guides the preparer through the steps of completing the tax return.
Ability to prepare federal and state returns at same time. Using tax preparation software, many taxpayers can prepare both the federal and state returns at the same time.