Deductions & credits

You will have to reference your 2018 return for the amounts to enter into TurboTax.   In your Federal return, type 'carryover' in the Search area, then 'Jump to Carryover' and choose Edit.

TurboTax asks for amounts from your 2018 return (screenshot),  but you should be able to carry over $3000 this year (and forward) until your loss is used up, as you stated.

You must be in your California return, as the Federal return does not ask for state amounts.   If you complete the entry in your Federal return, you may not need to enter a 'California Carryover'  amount in your state return. 

If so, you may need to reference your 2018 California return.   In most cases, the Regular Tax and AMT amounts are the same, unless you had Form 6251 in your 2018 return.