The only time it is recommended that you open a link in a new tab is when opening in the same screen would interrupt a process (e.g. when a user is filling out a form or viewing a video). Linking in the same tab or screen in these situations could cause the user to lose the work they've done or have to start over.
Should links open in a new tab SEO?
Outgoing links are a vital aspect of SEO. If the linked page opens in a new window, it can reduce your bounce rate and exit page percentage, which can help to increase its overall page value or authority.
Why do some links open a new tab?
Plugins and extensions cause Chrome to open links in new tabs. To eliminate this problem, all you need to do is disable them.