How do I cancel my order for alabama state taxes? I accidentally paid $50 for using turbotax, but I don't want to pay that and would rather just mail in my state tax.

Did you already pay?  They don't usually give refunds for the online version.  

Contact Customer Service
5am-5pm Pacific Time Monday -Friday
https://support.turbotax.intuit.com/contact/

What is the Turbo Tax phone number
https://ttlc.intuit.com/community/using-turbotax/help/what-is-the-turbotax-phone-number/00/25632

if you haven't paid it yet,  You can try to delete the state,   

https://ttlc.intuit.com/community/using-turbotax/help/how-do-i-delete-my-state-return-in-turbotax-online/00/25895