Is news countable or uncountable?

[Mister Micawber]

Hello, Farhan - and welcome to English-test. If you say that, then you are not using good or native English. You have two choices:

I have some good news for you.
I have a piece of good news for you.

They mean the same.
_________________
Native English teacher at Mister Micawber's

[Farhan Baharin]

Thank you sir. But it seems like most of the people nowadays when they speak, they tend to use that sentence. So is it incorrect?

[Beeesneees]

As you have already been told, 'I have a good news for you' is incorrect. The correct alternatives have been given.
You don't say what country you are in, but if you hear that regularly, you certainly aren't in a country where English is the mother-tongue. I can assure you that the vast majority of native English speakers certainly don't use that sentence.
_________________
Cheers m' dears!

[Farhan Baharin]

Well thank you. I'm just a person who is in the process of learning because we don't have English as our mother tongue but still, we have to learn it. For some point lots of things make me confuse.

[Code2004]

The adjective 'good' describes 'news'. 'News' is still uncountable. You must say 'I have good news for you'.

Edit: dang, I didn't notice this was on the first page! Apologies for that!