Can't find or don't need

1. How do you use don't need?
2. Which is correct not need or no need?
3. Do not found or do not find?
4. What is the difference between don't need to and Needn T?

How do you use don't need?

Don't need to – not necessary

You can do it but you don't need to do it if you don't want to do it. You don't have to pick me up at the station. I can take a taxi. (=You can pick me up, but you don't need to do it).

Which is correct not need or no need?

The short answer to your question, though, is that both are correct.

Do not found or do not find?

Because of the auxiliary verb has, you must use the past participle of find. So it should say, “She has not found.”

What is the difference between don't need to and Needn T?

Needn't+verb and don't need to+ verb are synonymous and interchangeable in most contexts. Bear in mind that needn't is considered more formal/posh and is more common in the UK than the US. Where there is a difference, however, is when talking about the past.