HMRC has asked taxpayers to tweet their queries instead of phoning government helplines as it emerged that waiting times have doubled over the past year say Harris & Co accountants Northampton. Figures published by HMRC show that callers had to wait 10 minutes and 53 seconds on average for advice in September – more than twice the five minutes 21 seconds during the same month in 2013. The department has now directed taxpayers with problems to its @HMRCcustomers account on Twitter for help.