Question : How do I run a private sub located in a subform from its parent form?

I have a private sub called recalculatetax which I have run whenever a control in the subform is updated.  But I also want it to run if the shipping destination is changed in the main form i.e. update the [taxes] in the subform, when the [shipto] control is updated in the mainform.  Suggestions?

Answer : How do I run a private sub located in a subform from its parent form?

From the parent for you can use:
Me.SubformControlName.Form.MypublicSubName