RFI for International Tax Modelling Tool

The Internal Revenue Service is seeking information to identify a secure, agency-compatible software solution for modelling and analyzing complex international tax provisions under the One Big Beautiful Bill. The agency needs to enable its personnel to evaluate tax impacts and taxpayer planning strategies, support the integration of tax return data such as XML ingestion, and secure associated services including training, ongoing maintenance, and operational integration. The problem the agency is trying to solve involves understanding the impacts of international tax provisions while ensuring the solution integrates into existing operations. The scope of work covers the development and delivery of the customized tool alongside comprehensive support services, user training, and long-term maintenance. The agency is requesting descriptions of available options for ongoing vendor support, including service models, service level agreements, and long-term maintenance considerations for exclusive agency use. Respondents must also recommend appropriate pricing structures, provide an estimated total cost for the full scope including recurring annual costs, and provide an estimated timeline for development and customization. Eligible respondents must perform all work offsite and within the United States. The agency is requesting proposals to establish budget expectations for a contract period of one year. Interested parties must submit their responses digitally via email or online, though the source does not specify a closing date for submissions.