Software Enhancement for Eway and Einvoice

I need a skilled freelancer to improve my current project's functionality. The project is operational but requires modifications for better performance.

Key tasks include:
Eway Introduction Enhancements:
- Adding user authentication
- Implementing data validation
- Developing reporting capabilities

Einvoice Modification and Overall Software Improvements:
- Enhance existing features
- Fix any identified bugs

Ideal Skills and Experience:
- Web development and programming expertise
- Proficient in Microsoft Access, VB.NET, and Crystal Reports
- Strong problem-solving and attention to detail

Please ensure all changes are implemented without introducing new issues. Looking for a quick turnaround on this project.