I want to launch a web platform that allows users to prepare and file their U S income taxes end-to-end. The core of the site is an online return wizard that walks someone through every question, calculates their liability or refund in real time, and transmits the finished return electronically to the IRS. Scope of work • Responsive public pages that explain how the service works and outline pricing. • A secure user area (email / MFA sign-in) where filers can start, pause, and resume returns. • Interactive form engine that mirrors the official IRS layouts—Form 1040 and schedules to start, with a structure that lets me add business or nonprofit forms later without rewriting the codebase. • Automatic validation of SSNs, EINs, and common input errors before submission. • Real-time tax calculation logic that updates refund/amount-due as answers change. • PDF generation plus an e-signature step compliant with IRS e-file rules. • API-based e-file transmission and retrieval of acceptance / rejection codes. • Admin dashboard showing filing volume, user activity, and error logs. Tech notes I am open on the stack, but I already host other projects on AWS so solutions that fit comfortably there (Lambda, RDS, S3, Cognito, etc.) will be a plus. Front-end frameworks like React or Vue are fine as long as the codebase is clean and maintainable. All sensitive traffic must be encrypted (TLS 1.2+), and PII has to be stored using field-level encryption at rest. Deliverables • Working web application deployed to my AWS account • Source code in a private Git repo with clear README and setup scripts • Documentation covering architecture, deployment, and how to add new IRS forms • A short video walkthrough demonstrating a complete filing from sign-up to IRS acceptance Acceptance criteria The first live filing of a Form 1040 must pass the IRS test suite and return an acceptance acknowledgment code. Performance should stay under 300 ms average server response for typical form page requests with 1,000 concurrent users. If you have already worked with tax preparation, e-file integration, or other fintech compliance projects, please tell me about it when you apply.