"Of the $13.0 million spent on pilot development and implementation, $10.6 million is technology and product development costs and $2.4 million is operational costs (customer service, cloud computing, user
authentication, etc.)"
"Nearly half of Direct File users reported paying for tax preparation last year, and the Treasury Department estimates that Direct File users saved $5.6 million in tax preparation fees"
"Of the $13.0 million spent on pilot development and implementation, $10.6 million is technology and product development costs and $2.4 million is operational costs (customer service, cloud computing, user authentication, etc.)"
"Nearly half of Direct File users reported paying for tax preparation last year, and the Treasury Department estimates that Direct File users saved $5.6 million in tax preparation fees"
https://www.gao.gov/products/gao-24-107236
https://www.irs.gov/pub/irs-pdf/p5969.pdf
edit: this comment had a much different estimate earlier based on a less specific source