Today CRA issued Revised Form T661: Claim for Scientific Research and Experimental Development (SR&ED) in Canada [1].

The form number is T661 E (04). A guide to the new form has also been issued. The guide, which is numbered T4088-04e [2], is effective February 9th, 2005. The previous guide T4088-03e [3] is effective for claims filed on or before July 31st, 2005. Claims should now be filed on the new form.