In parallel with this site highlighting people's difficulties in trying to get through to HMRC on the phone, HMRC have admitted to the Guardian that its call centres and helplines are failing to cope with demand from the public.
Callers are frequently cut off, or left hanging in lengthy queues.
Guardian Money recently published a letter from lecturer Dr Hillary Shaw, detailing his problems trying to get through to HMRC on its 0845 070 3703 number.
"After navigating several levels of automated number choices you get the message that this line is busy, please call back later. No option of hanging on, you must expensively re-navigate with no certainty of success, repeatedly."
The letter prompted an outpouring from other Guardian readers suffering similar frustrations.
An HMRC spokesman said:
"We are experiencing a higher level of demand than usual because of the well-publicised issues around PAYE notices of coding. This means customers are finding it more difficult to get through.
It is standard practise within our contact centres to play 'busy' messages when the helpline is full. This ensures customers on hold do not wait in a queue for an unreasonable length of time. As a rule, we cap queue lengths at eight minutes."
HMRC is like the M25, it has become so popular that it cannot cope with demand.
Tax does have to be taxing.
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