The distribution code will determine how any taxes are calculated on the 1099-Q income. You need to contact the financial institution that issued the 1099-Q and learn the distribution code for the withdrawal of funds.
Form 1099-Q - Payments from Qualified Education Programs
Distribution Codes
The issuer needs to let you and the government know the code. They will need to reissue to you both with the correct code. A blank is not acceptable.
I called Utah529 and the person didnt know anything about 'Distribution Code' and she also informed me that 1099-Q is not required to be reported unless i had unqualified withdrawals. Since all my withdrawals were used for qualified expenses, not sure if 'Distribution Code' is needed. And if it is, then based on above response, '1' sounds most appropriate as it is "Distribution'. I have no clue