Cannot link my adsense account to my new blog


I have an adsense account, but I cannot link it to my new blogger blog. I get a message saying I need to create an adsense account, which I already have. I have no idea what is going on. I’ve done this before and all I’ve had to do is click the Earnings tab and it allows me to add the email of my adsense account, but that is not happening now!Help will be greatly appreciated!