This article by TurboTax says that tax docs (1099s, etc) are often available for customer viewing before becoming available for upload into TurboTax. I'm having the same issue as you are, and I am just to retry the upload over the next few weeks.
https://ttlc.intuit.com/turbotax-support/en-us/help-article/banking/import-1099/L73REMMxe_US_en_US?u...
