There are scripts to enable shell completion in TaskWarrior (e.g. for projects and tags). Since I use cygwin with mintty <a href="https://github.com/maxigit/dotfiles/blob/master/task_completion.sh">this one was suitable for me</a>.
I added the lines
```bash
complete -o nospace -F _task t
complete -o nospace -F _task task
complete -o nospace -F _task ta
```
at the bottom though to support the shortcuts `t` and `ta`.