LinkedIn won't let me log in anymore

did you sign up with Google or Apple originally? if so there's no LinkedIn password, the password box will keep failing no matter what you type. use the Continue with Google/Apple button instead. caught me out after a laptop change.

What does it say exactly? "Wrong password" and "your account has been restricted" are different problems. If it's the password, do Forgot password and use the reset link from the email. If it's restricted, LinkedIn does that when it sees unusual activity, and it'll usually ask you to verify your identity before you can get back in. There isn't a way around that step. And if it's stuck on a verification code going to an old number, that's a help centre request too.