Does claming common law on your tax return mean that you are now common law, and that all of your investments and real estate investments are shared? Situation:

• Starting dating in 2021, living separately. Moved in together January 2022 (BC)
• Bought a condo with my own money and my mom cosigning on the condo in December 2021. Only purchased with my money for the downpayment
• Considering using Line 30300 to get a larger tax return

When I read the common laws, it says "The property division rules apply to unmarried couples who have lived together in a marriage-like relationship for at least two years." However, is this not applied if you apply for common law during taxes?

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TLDR Living together only for a little over the year, does claiming common law on my tax return mean that in case of breakup we split all assets as if we were living together for over 2 years?