Unfortunately, I don't have a solution to your problem. Two years ago, I had the exact same thing happen to me, and I ended up having to manually enter all of the deductions, which was a royal pain in the you know what. It said I didn't have an Internet connection, but I could connect directly to the ItsDeductible web site, but, like in your case, the Turbo Tax software couldn't access/import the information. I was also able to import information from other organizations (employer, banks and investment firms), but not from ItsDeductible.
I am fairly technically savvy (20+ years working with personal computers and softwares, setting up networks, teaching computer courses at a community college, etc), and I couldn't resolve the problem when I encountered it. I did send a not so nice e-mail to Intuit after I finished my taxes. I let them know about the problem and the fact that I was not happy with having to manually enter all of the deductions, which defeats the purpose of having a web site like ItsDeductible.
I hope you are able to resolve the problem by repeated attempts to get Turbo Tax to import the information from ItsDeductible, and that you don't have to manually enter all of the information. Again, sorry I don't have a solution. I just wanted to let you know that you're not the first person who has encountered this. But, now I'm ticked that after it happening to me 2 years ago, they haven't fixed the problem and it has now happened to someone else.