“The test contained in the statute is not whether the taxpayer has an honest and genuine belief but whether there is a reasonable excuse”
“What is clear is that there was a muddle and a bona fide mistake was made. We all make mistakes. This was not a blameworthy one. But the Act does not provide shelter for mistakes, only for reasonable excuses. We cannot say that this confusion was a reasonable excuse. Thus this default cannot be ignored …”