# The basics

- [Customization](/en/rekassa/the-basics/customization.md): To connect the online store to reKassa, follow the steps described below
- [Environment](/en/rekassa/the-basics/customization/environment.md)
- [Currency code](/en/rekassa/the-basics/customization/currency-code.md)
- [Currency rate](/en/rekassa/the-basics/customization/currency-rate.md)
- [Test Data](/en/rekassa/the-basics/test-data.md)
- [How to Access the Test Cash Register Dashboard](/en/rekassa/the-basics/test-data/how-to-access-the-test-cash-register-dashboard.md): Request to Be Added to the Test Cash Register