How do I send proof that last years Alabama state taxes I owed was paid out of last years federal return

That's not an option, so you wont find any proof.     State taxes due can never be paid automatically from a federal refund.

The ONLY thing you can pay from your federal refund is your TurboTax fees.  Apparently, you did not pay the state, so you still owe AL.

TT does a bad job of presenting tax refund/liability.  they combine both state and federal amounts  into one number.  so if you're due a refund from one but owe the other, you only see the net.  

Unless your READ the instruction sheet that prints out with your copy of the return, then its pretty clear.

Your only proof of a state tax due payment is your bank statement or credit card showing it coming out.

The state tax can not be deducted from the federal refund.  You can only have the Turbo Tax fees deducted.  You will still get the full federal refund minus any fees you had deducted.  Turbo Tax just shows you a screen at the end showing the Net amount of federal and state combined.  But it is just for your own info.  You do still have to pay the state yourself separately.   See,
https://ttlc.intuit.com/questions/2402584-can-i-pay-my-state-taxes-from-my-federal-refund

Check the printout or PDF of your return; look for the state cover sheet with the Turbotax logo.  If you owed tax, it will show the payment information and how/when you decided to pay.  Read the state payment instructions carefully since most states cannot be paid from within the TT system and requires additional steps.
https://ttlc.intuit.com/questions/1900884-what-are-my-options-for-getting-my-state-refund-or-for-paying-any-state-taxes-i-owe