Taxsoftware.com (http://www.taxsoftware.com) says an application for six of the most often used 2010 federal tax returns is now available on the Mac App Store. The forms can be completed entirely on Macs.

The app for the 2010 tax year version of Form 1040 return includes most forms and schedules needed to prepare tax returns. Paid preparers must be registered with IRS and have an EFIN, a PTIN and an IRS E-services account. They must also be registered with a Taxsoftware.com Eservices account and have a digital ID.

All business forms include depreciation of up to 10 assets and the use of one vehicle for business. The app includes unlimited tax preparation and printing. There is an e-filing charge of US$4 for a Mac App 1040 and a $15 fee for any Mac App business return (1041, 1065, 1120, 1120S and 1099-MISC.)