This is one way to accomplish your goal :
Option Explicit
Private Sub btnCancel_Click()
Unload Me
End Sub
Private Sub btnOK_Click()
Dim ws As Worksheet
Set ws = Worksheets("EXPORT")
Dim newRow As Long
newRow = Application.WorksheetFunction.CountA(ws.Range("A:A")) + 1
ws.Cells(newRow, 1).Value = Me.txtAa.Value
ws.Cells(newRow, 2).Value = Me.txtVessel.Value
ws.Cells(newRow, 3).Value = Me.txtTK.Value
ws.Cells(newRow, 4).Value = Me.txtProduct.Value
ws.Cells(newRow, 5).Value = Me.txtEnapeh.Value
ws.Cells(newRow, 6).Value = Me.txtAheh.Value
ws.Cells(newRow, 7).Value = Me.txtDestination.Value
ws.Cells(newRow, 8).Value = Me.txtLit.Value
ws.Cells(newRow, 9).Value = Me.txtKg.Value
ws.Cells(newRow, 10).Value = Me.txtDensity.Value
ws.Cells(newRow, 11).Value = Me.txtLit2.Value
ws.Cells(newRow, 12).Value = Me.txtKg2.Value
ws.Cells(newRow, 13).Value = Me.txtVef.Value
ws.Cells(newRow, 14).Value = Me.txtShipVef.Value
If Me.txtProduct.Value = "UNLEADED" Then
WriteToSheetUnleaded
End If
clrForm
Me.txtAa.SetFocus
End Sub
Sub WriteToSheetUnleaded()
Dim ws As Worksheet
Set ws = Worksheets("UNLEADED")
Dim newRow As Long
newRow = Application.WorksheetFunction.CountA(ws.Range("A:A")) + 1
ws.Cells(newRow, 1).Value = Me.txtAa.Value
ws.Cells(newRow, 2).Value = Me.txtVessel.Value
ws.Cells(newRow, 3).Value = Me.txtTK.Value
ws.Cells(newRow, 4).Value = Me.txtProduct.Value
ws.Cells(newRow, 5).Value = Me.txtEnapeh.Value
ws.Cells(newRow, 6).Value = Me.txtAheh.Value
ws.Cells(newRow, 7).Value = Me.txtDestination.Value
ws.Cells(newRow, 8).Value = Me.txtLit.Value
ws.Cells(newRow, 9).Value = Me.txtKg.Value
ws.Cells(newRow, 10).Value = Me.txtDensity.Value
ws.Cells(newRow, 11).Value = Me.txtLit2.Value
ws.Cells(newRow, 12).Value = Me.txtKg2.Value
ws.Cells(newRow, 13).Value = Me.txtVef.Value
ws.Cells(newRow, 14).Value = Me.txtShipVef.Value
End Sub
Sub btnDelete_Click()
Selection.EntireRow.Delete
End Sub
Sub clrForm()
Dim ctl As MSForms.Control
For Each ctl In Me.Controls
Select Case TypeName(ctl)
Case "TextBox"
ctl.Text = ""
' Case "CheckBox", "OptionButton", "ToggleButton"
'ctl.Value = False
' Case "ComboBox", "ListBox"
'ctl.ListIndex = -1
End Select
Next ctl
End Sub