Existing Tax-Compliance Platform — Xero/QBO Integration & New Jurisdiction

We are looking for a developer/company that already has a working tax-compliance platform with Xero and/or QuickBooks Online integration. We are not looking to build the platform from scratch. The platform should already provide the underlying infrastructure for accounting-data ingestion, normalization, tax processing, and compliance outputs. The second requirement is that the platform must be configurable for a new tax jurisdiction. We will provide the jurisdiction-specific tax logic and requirements, including tax classifications, calculations, rates, thresholds, effective dates, forms, mappings, and test scenarios. Your role would be to configure and implement our tax requirements within your existing platform. In simple terms: You provide the existing technology platform. We provide the tax domain and rules. Please demonstrate your existing platform, particularly its working Xero/QBO integration, and explain how new tax rules and jurisdiction-specific requirements can be configured. We are interested in reusing and adapting existing technology, not commissioning an entirely new platform.