@toddswebemail , per your original post and subsequent explanations, your US employer appear to be using an accountable method to re-imburse you for some expenses and these ( re-imbursements ) are not shown as income on your W-2. Therefore you are not taxed on these. So I think you are therefore clear on this .
However while going over this thread, and because you are a US person ( citizen / GreenCard), having a foreign tax home, I have the following questions:
(a) are you filing your yearly US returns ( US taxes you on world income )?
(b) are you paying your Social Security and Medicare contributions and if so how ?
I recognize that i and if you are filing a US return that you can exclude ( probably all if not most ) your foreign earned income from US taxation, but you have to file top do it.
Is there more I can do for you ?
pk
