This is the reason why some people especially sage users don't like QB. Personally I don't find it a problem if its only one user on QB its when its multiple users it may become a problem especially if people aren;t familiar with QB.
Basically if you say put the wrong amount down on an invoice that you are inputting, say you inputted £5 and it should have been £5.50, you can go back into the transaction and change the figure and then click on Save. Becareful if its a VAT period that has been finished and filed as you may need to do an additional invoice so you don't mess up the vat thats already been done. QB in my opinion is more user friendly but if you are use to Sage it will take time to understand QB and get use to it.
