Thanks for your reply. I am new at this, but this is what my experience is suggesting. An import of current year 1099 data into Schedule D on TurboTax doesn't require creating a TXF file of one's taxes. The import happens seamlessly, when you initiate it as you are working on your taxes in TurboTax and are instructed to type in your account number with your broker and the document ID number from your particular 1099.
However, in some cases and with some brokers, this process isn't possible. In my case, I am working on last year's return and my brokerage company, TD Ameritrade, only supports the sort of direct import described above with current year taxes. However, TD Ameritrade and many others also provide their 1099s in .txf file format, (which TurboTax created years ago and which should import easily). However, my understanding is that one must first create a separate .txf file of one's 1099 in one's financial software so that it can be imported into Schedule D. After this, one can go to the File menu in TurboTax and select Import>From Accounting Software (in Windows) in order to find where it is stored on one's computer.
So this is where my Windows computer seems unable to process and take onboard the .txf file and asks for an app. Has anyone else run into this problem? Did you download an app, or is there some financial software I need to download, or should I be expecting the TurboTax Premier Desktop software on my computer to serve as the financial software that should be facilitating the receiving of the .txf file (and if so, do I need to do anything to make this work)?
