An accountant friend tells me that the renewal date for his personal tax software is 1 January. He was a tad busy during the month and it wasn't until Wednesday 27th that he remembered to renew. Unfortunately there was a light glitch with the payment which he was unaware of until he arrived at his office on SUNDAY morning (31st Jan) to file his one remaining tax return. He'd been locked out of the system. Ooops!
Matters were resolved on Monday and the return was filed on 1 February.