Keeper Tax is a legitimate company created in 2018 and accredited by the Better Business Bureau. Keeper Tax has an A+ rating using the BBB proprietary grading system and 4.7 out of 5 stars.  Complaints by customers unhappy with the service left a negative review of the actual tax-filing process. Based on that feedback, you might choose to use the app to track and monitor your working expenses and go with another tax filing service for the actual filing.