# Testing in the Direct File Client App
The Direct File client app has many steps for completing a tax return, making manual testing and bug reproduction time-consuming. These tools help streamline the process.
## Dev-Only Control Panel
Access the control panel at `/df/file/account/` for development settings and data management:
- **Change date** - Set browser date to test deadline-related functionality
- **Data Import Profile** - Modify seeded test data (like date of birth) that can't be changed in the normal tax flow during local development
- **Download Data** - Export fact graph as JSON for attaching to pull requests or bug reports
- **Upload Data** - Import fact graph to quickly navigate to specific application states when testing PRs or reproducing bugs
- **Preview Tax Return** - View backend tax return preview
- **Load Preach UUID** - Load specific Preach configurations
## All Screens
Navigate to `/df/file/all-screens/index.html` to view all application pages in one location.
This page displays every screen in the tax flow and post-submission pages. Use the menu to filter and manipulate the view. Generate a PDF by pressing "p" and using the [Just-One-Page-PDF Chrome extension](https://chromewebstore.google.com/detail/just-one-page-pdf-an-awes/fgbhbfdgdlojklkbhdoilkdlomoilbpl?hl=en&pli=1).
## Flamingo Fact Checker
Use the [Flamingo Fact Checker](df-tools/Flamingo-Fact-Checker.md) to monitor specific fact values as you progress through the tax flow.