Worksheet on428 2026

1. Click ‘Get Form’ to open the worksheet on428 in the editor.
2. Begin with Step 1, where you will enter your Ontario non-refundable tax credits. Fill in the base amount and subtract your net income as indicated.
3. Proceed to Step 2, entering your taxable income from line 260 of your return. Depending on your income level, complete the appropriate column for Ontario tax calculations.
4. In Step 3, input your Ontario tax on taxable income and any applicable credits. Ensure all calculations are accurate before moving forward.
5. Continue through Steps 4 to 7, filling in details regarding tax reductions and health premiums as prompted by the form.

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