No, he cannot claim his laptop, as you already had the computer before his start date.

Please review the links provided below for assistance on helping you understand the needs of a new business.

From TurboTax Blogs:

• What You Need to Know About Claiming Start-Up Costs For a New Business in Canada
• 5 Tips for Starting a New Business in Canada

From Government of Canada:

• Starting a business

• Checklist for new small businesses

Thank you for choosing TurboTax.