Do zobaczenia!
This is a very versatile phrase that can be used in many situations, from saying goodbye to friends to ending a business meeting.
Here are some other options, depending on the context:
* Do zobaczenia wkrótce! (See you soon!) - This is a more informal way to say goodbye.
* Do zobaczenia później! (See you later!) - This is also an informal way to say goodbye.
* Do zobaczenia następnym razem! (See you next time!) - This is a more formal way to say goodbye.
* Trzymaj się! (Take care!) - This is a more casual way to say goodbye.
Note: The word "do" is a contraction of "do" and "się" (to yourself), and is often used in informal Polish.
In a more formal setting, you could also say:
* Do zobaczenia w przyszłości. (See you in the future.)
* Do zobaczenia przy innej okazji. (See you on another occasion.)
The best phrase to use will depend on the situation and the relationship you have with the person you are speaking to.