This is a market research notice for a cloud-based tax calculator software solution for the IRS, not a solicitation. The solution must use standard API architectures, be FedRAMP compliant, and integrate with IRS systems for automated tax calculations and reporting. The government seeks to determine vendor capacity for integration and adaptability to evolving tax laws. No budget, submission timelines, or performance location are specified in this notice. Responses are for information only, and the government will not reimburse any costs.