Windows Payroll Software with Tax Support

I'm looking for a skilled individual who can develop a comprehensive payroll software, primarily meant for Windows operating system.

Key Requirements:
- Tax Calculation and Filing: The software should be capable of handling all aspects of tax calculation and filing.
- Language: The software should support English language primarily.

Please note that I'm not requiring the software to have an employee self-service portal or time and attendance tracking. The primary focus should be on the tax calculation and filing aspects.

Ideal Skills:
- Strong understanding of payroll systems
- Proficiency in Windows software development
- Experience in tax systems and regulations

Please get in touch with your past work samples and an estimate of the time and cost involved in developing this software. Thank you.