No one missed any Point. The topic is not Mapping the Chart of Accounts.

No one can answer about mapping accounts when it depends first: that function is only used if the QB file is being Exported to a Tax program that accepts the input. Next, it matters what is the tax entity type. Third, it matters what is the Tax Program reading in the file. Fourth, not every entity type even has a Bal Sheet in the Tax form. Fifth, it isn't clear if you are following the concept of Post it to Asset first, then adjust it to Expense afterwards, or put it to Expense directly. Sixth: the TCJA means that for 2018 reporting, more things are directly Expense, so there is no Sec 179 to worry about. Seven: there is no Account named for Sec 179; that is a rule provision for helping you decide Up Front where you make that entry. It doesn't change Tax Line mapping.