Preparing returns: He has got familiar with most documents such as bills, declarations, and anything from CRA. He is always asking questions such as why stuff are done like that and how a customer can work around it. He was having trouble with CRA as some of things on the website are not really used in reality. For an example, commission employees can claim variety of expenses on the form T777, which include accounting fees, cellphones, computers... However, he came across expenses that are not specifically listed on the website, which resulted in understanding the nature of the taxpayer's job and referring back to the T2200, Declaration of Conditions of Employment.

Rephrase this to professional. Add new and more words.