So you do see that the correct product is shown in the account as a 2018 download, but off to the right there is not a blue Download button? That means you do at least have the download in your account, but the missing button is usually a browser problem.
Log out of all Intuit accounts. Empty the browser Internet cache, close the browser and reopen it. Then go to the link and try again. If necessary, do you have a third browser such as Edge?
Are you using any script blockers that might interfere? Sometimes ad blockers can interfere with certain page elements, too.
Also try this. When you open your browser back up after cleaning it as above, then use a private window (private browsing in IE; aka "incognito mode" in Chrome)
