The new forum will continue the work of the Gift Aid Forum, which had its final meeting last week, and will allow charities to communicate with HMRC about a range of other tax issues.
An HMRC spokesman said that the charity tax forum would continue to look at many of the issues raised by the Gift Aid forum in a final report published last week. It will have more members and will also address other issues.
The final Gift Aid report included recommendations for a database of Gift Aid donors available to all organisations and the opportunity to file Gift Aid claims online. But no timetable for those reforms has been set out.
Megan McInally, policy manager at the CFDG, said: "We are moving in the right direction, but the government has missed an opportunity to send out a real positive message by making a commitment to make some of the legislative and administrative changes necessary for allowing online filing and the use of a Gift Aid database."