Its common for funds to not report this information directly on the 1099.
In all likelihood, the dividends truly are from more than one state, so you are going to want to select "More than One State" - see screenshot below and Note below. But, its possible you can get a tax benefit on your state return if you can identify which state the dividends are from. The tax benefit you would get would be that your home state would not tax the dividends that come from your state, if there even are any. They would still tax the other dividends.
But, this information would only come from your financial institution. If it is not listed right on the 1099DIV (which it often is not), then you would need to contact your broker or financial institution for more information about the funds investments. It might be listed in your year-end reports or a prospectus online.
Also, you can not worry about trying to find the information and just select more than one state and continue if you:- Live in a state with no income tax (AK, FL, NV, SD, WA, WY)