@capitalmindset When you select non-resident S.216 in TurboTax Online, you should get the question "Which option best describes your residency status..." below and you can change whether you are a non-resident or a deemed resident. Once you've finished your return, you'll get the option to download a PDF to mail to the CRA, and that PDF will contain the T1159 return form instead of the regular T1 return.

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Under "Province/territory" I selected "Non-Resident S.216"

Under "Which option best describes your residency status as of December 31, 2024?", I selected "I was a non-resident of Canada".

@capitalmindset 

It says, "Deemed Resident by Section 216 election" because you are a "Deemed Resident" for the purpose of reporting your Section 216 related income.

For a resident of Canada, TurboTax Online will go through an interview process and then generate a filled out T1 tax return. But when you are making Section 216 election, you'll get a T1159 instead of a T1. The T1159 is all filled out, you just have to sign it and mail/fax it to the Canada Revenue Agency (CRA).