When I am eligible to post links on yahoo answers?

When you reach level 3. If you post urls in answers they will not be visible to anyone at level 1 and 2.

You can add links at any level but they will not be hyperlinks until you are at level 3. Links will sometimes stop a question from posting or if in an answer the answer will not be seen by others depending on the spam filters in place regarding links.

Copied from the Yahoo help page, 'Yahoo Answers uses a point and leveling system, based on trust, to protect the community against malicious links and spam. The ability to post clickable hyperlinks is dependent on your level.

Level 3 to 7 - URLs posted are live and clickable.

Level 1 and 2 - URLs are still visible but not clickable. To access these links, you'd need to copy and paste the URL into your browser's address bar. '

Yes you can post links but until you are a level 3 they will not be hyperlinks. Also be careful they links can block an question or answer from posting because of Yahoo Scam Filter.

You'll have to wait until reaching Level 3 before you can post links on this site. The rule is needed to protect this community from malicious links and spam.