Hi
Given CIC recognizes foreign work experience/ experience outside of Canada only until 3years and above - claiming experience points for all of your experience will be of no use.
given you have 5 years exp as an auditor in KPMG and Deloitte pick the best and stick to one.
if it is 3yrs in KPMG and 2yrs and in Deloitte - mention KPMG or vice versa, if this was half and half then you mention both.
You can mention all of your experience in the Personal History section However for the one you claim points for should be in Work history.
With regards to which code to chose there are only 2 that I see are close to your experience
1111 Financial auditors and accountants (
99% I would go with this)
1122 Professional occupations in business management consulting
Your occupation might be a regulated one and require further certification, etc
also this would reduce the amount of paperwork you need to submit to the IRCC in your application. This is no way is a misrepresentation of your facts but only giving the right info in the right place.