I know how to add a field (see below) to a pivot table, but from a
state where I don't know which columns and rows are added to the pivot
table, how can I "reset" the pivot table so I can add only the fields
I'm interested in?

Sheet1.PivotTables("PivotTable8").AddFields
RowFields:="Customer", _
ColumnFields:="CloseQuarter"
With Sheet22.PivotTables("PivotTable8").PivotFields("Sa les")
.Orientation = xlDataField
.Function = xlSum
.Position = 1
End With