I have a similar problem.
I feel it is pretty confusing when you receive 1099-G from the state. I received the form and the number in Box 2 is different from my 2018 Tax Return. I have also received a check from State of Cali earlier this year about some overpaid taxes. So I thought the sum of the check and the refund from 2018 tax return would make up the number in box 2 on my 1099-G "report of State Income Tax Refund". However, it is off by about $3. So I am pretty confused.
The Turbotax section "Tell us about your refund" does not mention any form or box numbers. It merely refers to the last year tax return and the numbers are already prefilled. I replaced the value for " Total Refund Received in 2019" by the value in the Box 2 of the 1099-G I received. I hope that is correct.
