The Swedish Tax Agency (Skatteverket) rejected Borg's filing for the 2008 tax year, claiming he had improperly claimed a deduction for the costs associated with maintaining two residences.
Borg had requested a deduction of 12,240 kronor ($1,770) for increased living expenses, and in so doing failed to abide by changes to the law which he implemented in the autumn of 2007.
“It was a mistake and I can only say I'm sorry. I signed both the tax return and the bill and therefore should have known which rules applied,” he told the TT news agency.
As a result of his mistake, Borg's tax rebate will be 6,000 kronor lower than he had originally calculated.