Recover Withholding tax

 Foreign dividends are generally subject to withholding tax regardless of whether you file taxes online or seek out the help of a professional. Recent studies have shown that governments retain over $300 billion in dividend withholding tax (DWT) every year. Most investors are unaware that foreign withholding tax can be reclaimed in full or at least in part. If you've never filed a reclaim, the amount at stake could be substantial.  

Withholding tax reclaims arise because the rate permitted under the terms of double taxation treaties is less than the default rate applied by most foreign governments. In most cases the only way to obtain your legal entitlement is to file a reclaim.

See  http://www.taxback.com/dividend-withholding-tax.asp  to calculate how much you can reclaim, and how to go about it.