How do I keep turbotax free without it automatically changing to deluxe because im under 25?

turbotax tells me im eligable for deductuions because im under 25 and then automatically upgrades me to a deluxe account which i cannot get rid of, contacted support to no help. FRUSTRATED

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Please see this TurboTax FAQ for more information on who can use Free:

Who can file for free using TurboTax?