In a development that is being seen by American expat groups in France as a major win, the U.S. Internal Revenue Service has admitted in a U.S. Tax Court that it had wrongly collected millions of dollars of tax from France-resident American citizens, ending a years-long legal saga that could see millions of dollars paid to U.S. expats who have lived in and been filing tax returns from France, in the form of refunds.

Proposed rule changes to the way “foreign income” earned by “Controlled Foreign Corporations” would be taxed by the U.S. would be good news for American taxpayers living in high-tax countries, tax experts have said.

The Democrats Abroad, which represents members of the U.S. Democratic Party who are resident overseas, is planning to mark International Tax Filing Day with a “CallStorm,” which is basically an event that looks to involve expat Democrats in calling up their Congressional representatives’ offices and voicing their concerns over key issues affecting expat Americans – in this case, the need to move to a residence-based tax regime.