Deloitte Deloitte offers a selection of software products, as featured throughout this supplement. ... Change of accounting date is catered for, and joinersa#39; and leaversa#39; adjustments are calculated for the personal tax return. ... The software is supplied on CD with an online manual and training. ... Digita a#39;s own final accounts solution, as well as other software packages, such as, CaseWare, Viztopia, Sage.