When you receive your keyboard, it will use the default layout.
If you want to change it, there are multiple ways to do it.
Using Vial
The easiest way to customize your keymap is to use Vial, a graphical interface.
You can follow the instructions here: https://github.com/Bastardkb/vial-firmware
Using QMK
- Clone https://github.com/qmk/qmk_firmware
- Go into the folder keyboards/bastardkb/tbk/keymaps or tbkmini/keymaps
- Make the appropriate changes to the layout
- Compile and flash
Using QMK Online Configurator
- Use https://config.qmk.fm
- You can select the tbk or tbkmini keyboard
- Make any appropriate changes to the layout
- Compile and flash