I had the same issue about a week ago, also with a MAC. The online chat help could not solve it after patiently spending a lot of time. He suggested that I try the next day. We did see the screen option for Turbo to calculate the most advantageous method for me, and to compare both, but it just kept giving 0 as a foreign tax credit. I wonder if this is a bug in the software ?
I tried again, and another online chat person told me to fill in the itemised rather than standard deduction. This worked, but after printing all my forms (closing the ticket) and sending them to the IRS with the money I realised that it did not print out the 1116 form to apply the foreign tax the credit that I could carry forward.. My case is fairly simple as the tax treaty is only one way, I now have to amend my tax return.
I suggest reading the booklet on foreign tax credit and instructions for form 1116 several times to be prepared because the online chat people are not specialists in this, although very kind and patient. It helps to manually complete the relevant forms to learn more about it, but I am a bit disappointed that I spent several hours on this for no reason.
