What is CCH Engagement Audit Tax & Accounting System Requirements ☰ CCH Engagement: Tax & Accounting Contact us today The complete content of the Australian Accountants Toolkit are directly integrated with CCH Engagement. The Tax and Accounting content library consists of procedures, checklists, letters, and calculators, which can be customised and tailored to meet the compliance needs of the engagement. Tax and Accounting Content Existing Users can download the latest Knowledge Tools for Tax and Accounting Content below. 2018 Tax and Accounting Download the 2018 Tax and Accounting Year-End Letters Download the 2018 Tax and Accounting Workpapers (FBT) Download the 2018 Tax and Accounting Workpapers (FBT) Release Notes 2017 Tax and Accounting Download the 2017 Tax and Accounting Workpapers Download the 2017 Tax and Accounting Workpapers Release Notes 2016 Tax and Accounting Download the 2016 Tax and Accounting Workpapers Download the 2016 Tax and Accounting Workpapers Release Notes