Sage took over 100 calls to its support line within an hour of opening on Tuesday, the day after the pre-Budget report announced a 13 month amendment to VAT.

The VAT percentage change saw the software company's Accountants' Club Priority support line inundated with calls as accountants battling to make the four day deadline of changing the percentage from 17.5% to 15%.

Greg Ford, managing director for Sage Accountant's Division said: 'We had over a hundred calls to our Accountants' Club Priority Link support line within an hour of opening on Tuesday morning and we have published a guide for our customers on how to deal with the changes on our website.'