My business net income is totaling over $8,000 more than I am reporting. I have gone over the numbers but cannot find where the error may be

Did you get any T-slips? The CRA considers amounts in box 20 and box 48 of the T4A slip as self-employment/business income. Also Box 81, 82, or 83 on the T4 slip are also self-employment/business income.