Even if you have no income in 2025, filing a return at age 18 is required to receive GST/HST credit payments and, potentially, provincial benefits. To file for benefits, use free, certified NETFILE software like TurboTax, enter your personal information and $0 income, and follow the prompts. It is a simple return, and you can use the TurboTax DIY free version. 

https://turbotax.intuit.ca/tax/software/online

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