In order to claim these deductions, you must either provide or
be able to produce the following upon request:
Receipts
Invoices
Mileage logs
Lease agreements
Insurance statements
Expense reports
Payroll reports
Inventory reports
Sales reports
Balance sheets
Cash flow statements
# 2 — Document Each Deduction Properly
A copy of last year's return.
Proof of any previous amounts paid for this
tax year.
Any notices of assessment or communication
from the CRA or IRS.
# 3 — Give Your Accountant or Tax Professional
If you are a sole proprietorship or partnership,
meaning that your business taxes are filed
with your personal taxes, your will also need to
provide your personal tax information.