Multiple If Statements within OnEdit

Trying to create if statement such that when a specific cell changes (either D64 or D61) one of the two checkdata functions runs accordingly. Currently only works for the first (d64)? I am new to Script and GSheets transitioning across from MS and VBA so any help gratefully received. Cheers

enter code here
if(e.range.getA1Notation() !== 'D64') return
   checkData1()

if(e.range.getA1Notation() !== 'D61') return
   checkData2()
}


function checkData1() {
if(SpreadsheetApp.getActiveSheet().getRange("D64").getValue() == "Yes")
        SpreadsheetApp.getActiveSheet().getRange("E64").setValue('Task Complete')

    else if(SpreadsheetApp.getActiveSheet().getRange("D64").getValue() == "-")
        SpreadsheetApp.getActiveSheet().getRange("E64").setValue('Is the NDA.... Complete?')

    else if(SpreadsheetApp.getActiveSheet().getRange("D64").getValue() == "Action")
        SpreadsheetApp.getActiveSheet().getRange("E64").setValue('NDA Required ASAP')
      }

function checkData2() {
if(SpreadsheetApp.getActiveSheet().getRange("D61").getValue() == "Yes")
        SpreadsheetApp.getActiveSheet().getRange("E61").setValue('Task Complete')

    else if(SpreadsheetApp.getActiveSheet().getRange("D61").getValue() == "-")
        SpreadsheetApp.getActiveSheet().getRange("E61").setValue('Is the NDA.... Complete?')

    else if(SpreadsheetApp.getActiveSheet().getRange("D61").getValue() == "Action")
        SpreadsheetApp.getActiveSheet().getRange("E61").setValue('NDA Required ASAP')
      }