Your instruction to provide detail reads, "select the entry space, right click on the + sign; in the back-up sheet enter "US-UK Totalization agreement and per IRC Section 3111(c) and Section 1401(c)" and enter the excluded income as a positive number. On my TurboTax Home and Business 2020 (Windows 10) right-clicking on the + sign doesn't take me to any "backup sheet". It offers a grayed-out "Find Next Error" and a not-grayed-out "About SE Adj Wks", which just loads a help display for the worksheet. How do I access the "backup sheet" to enter the reason for this entry? I am able to modify the entry and it has the intended result (zeroes out SE), but I'll have to type up a note and attach it manually if there's no way to get the reason into the forms I file.
