For Bulgarian and other EU citizens:
Where do I vote? You can vote at the polling station based on the permanent address indicated on your ID card. If you want to vote based on your current address, make sure to register with the local administration there at least 14 days before the election.
Additional info for EU citizen voting in Bulgarian EU elections: If you want to vote in Bulgaria, you must register on 40 days before the elections at the latest, by submitting an application to your local administration.
You may find further information on polling stations, prior registration and voting by mobile ballot box on the website of the Central Electoral Commission (in Bulgarian).
What documents should I bring? You should bring your ID.
Accessibility Information: If you have a permanent disability that prevents you to go to the polling station, you may vote from home with a mobile ballot box, but you need to declare your wish to do so not later than 14 days before elections.
You may find additional information on the website of the Central Electoral Commission (in Bulgarian)