This may be a browser issue. Clear cache and cookies from your web browser. Close the browser. Relaunch the browser. Sign onto your TurboTax account - https://myturbotax.intuit.com/
If the problem persists then change your web browser
That did not work, I've cleared the cookies and the cache more than once. Relaunched my browser (Explorer) and still get a blank screen when saying I will add another form manually.