 The deadline for Canadians to submit tax returns is April 30. CRA IT specialists are working on the computer system and have traced the source of the problem to software maintenance conducted on March 4, 2007.
<coherence>  The deadline for Canadians to submit tax returns is April 30. CRA IT specialists are working on the computer system and have traced the source of the problem to software maintenance conducted on March 4, 2007.
 The deadline for Canadians to submit tax returns is April 30. 