Government Malta Inland Revenue Website Problems


I was using the government's Inland Revenue Website. At least it doesn't use flash so that's more usable for all.
However, the webmasters don't seem to be aware of popular new browsers such as Mozilla Firefox (there's not a reference to it, there's a reference and a photo of Netscape.. oh well) - though it works ok with it.

The online income tax calculator which I had to use because the IRD forgot to send me the income tax form (then they sent it late, but they sent it without the booklet still!) and booklet, well it's got some bugs. It hasn't been tested. Or it hasn't been tested properly.

It allows you to enter ridiculous amounts, even negative figures. One would have imagined that the programmers would know how to do this if they had been at University studying some programming course...
But even though you enter whatever figures you enter, the calculator always says that you owe the department tax! As much as I tried, I could never get it to tell me that they 'owed' me (fictitious) tax ('tax' overpaid).

After the fun, I used it with proper figures and it worked well. But those checks for extreme values are missing. They could be done even by some javascript...
Also there's an online tax declaration form (not the entire one, just the one they send you a month before to declare that you haven't earned much so you won't fill in the real return form) which is a year out of date (they forgot to update it).
Can you update the site folks?