Hi! I would lik to know which is the correct way: Haven´t got or don´t have. What is the difference between them?
No difference.

I've heard it said that Americans prefer 'don't have', and that 'haven't got' is more British, but everybody everywhere uses both forms.

Some older speakers of british English consider 'don't have' as American, and 'haven't got as substandard. As a result you will hear, from such speakers:

I haven't any qualms about this.
I have no qualms about this.

There is a long running (and very funny) BBC radio comedy show, I'm Sorry I Haven't a Clue
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Have got is wrong when you are referring to an action. Respond to a question about your actions like this: 'Do you drink coffee every day?' -'No, I don't have a cup every day.' Remember, when you want to tell whether an action is a necessity or not -like an outer obligation use -don't have to -'I don't have to attend that business meeting.' versus when you feel obligated 'from within' use must -'I must take a shower every day in order to get off to a great start.' If you don't want to refer to how you are obligated or what causes the necessity you use either I don't have to/ haven't got to..leave early tonight. Thanks
 fivejedjon's reply was promoted to an answer.
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thanks all!