Need Help Coding ComboBoxes

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Tabbing to pre-specified combobox can be set in combobox's properties when on UserForm but not when placed directly on a worksheet

It would have been helpful to tell us what you had tried and had not worked with your existing setup
Are you using Form Control or active-x combo-boxes?
If suggestion below does not work for you, please provide a bit more information - thanks

Note - this suggestion applies to active-x combo boxes

ComboBox2.Activate is the line of code to activate ComboBox2

1. Clicking on any cell after making selection in ComboBox1, takes user to ComboBox2

Private Sub ComboBox1_LostFocus()
    ComboBox2.Activate
End Sub

2. Or try the same line of code as the LAST line in ComboBox1_Change