Did you follow the procedure as shown in the the following TurboTax support FAQ for removing MAX - https://ttlc.intuit.com/community/downgrading/help/can-i-remove-max/01/26691
If you did and MAX is not removed, then contact TurboTax support for assistance.
See this TurboTax support FAQ on how to contact Support - https://ttlc.intuit.com/questions/3401489
