I had the same problem.
You can go to It's Deductible and sign in
Select the HOME tab
Select the year you are working on
There will be a box with the type of donations. Below the box it says CHARITIES
Under CHARITIES select MANAGE CHARITIES
Click the EDIT button by the charity you wish to edit and enter the address and save.
When you import the It's deductible into Turbotax, the addresses will automatically be entered on form 8283
Hope this helps.
