Just toggle into Forms view in TurboTax. Then you can see exactly how all the computations are being done and it is not a black box at all. You can even right click any cell inside the forms view and find out where the source data is coming from and from what regulations they are pulling the calculations. Perhaps you have never explored this. I have built my own spreadsheets, and when I was not quite sure of some subtlety I would mock it up in TurboTax and go to the forms view to make sure I had modeled it correctly.
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Just toggle into Forms view in TurboTax. Then you can see exactly how all the computations are being done and it is not a black box at all. You can even right click any cell inside the forms view and find out where the source data is coming from and from what regulations they are pulling the calculations. Perhaps you have never explored this. I have built my own spreadsheets, and when I was not quite sure of some subtlety I would mock it up in TurboTax and go to the forms view to make sure I had modeled it correctly.
Post: Outside the Box
Link to comment from April 7, 2021