The company said it outperformed the industry in both the assisted and do-it-yourself category. In the DIY (self-prepared) category, Block was down 5 percent, compared to 8 percent overall. Its decline with assisted returns was 5 percent, better than the over 13-percent drop reported by the IRS.

Block expects overall and company volume will improve during the second half of the season. However, it expects "company performance relative to the industry is expected to moderate given the conclusion of its Free Federal 1040EZ and Refund Advance promotions on February 28."