To give you a detailed and complete answer to your question about closing your business, we would need additional information. If you have no expenses or income you would claim 0 but there are other factors to review depending on the kind and size of business you had. Please see our TurboTax article: Tax Obligations After Closing Your Business
Please contact the Canada Revenue Agency (CRA) to advise them of your business closure and verify what your next steps are to be. CRA Individual tax enquiries line
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