As SteamTrain and Hal_Al address in their answers, the information on where to obtain the state information should be available through your broker and they provide additional details on allocation if you can obtain that information.
Here is a TurboTax help article related to how to allocate "unearned income" such as dividends: Allocating Income
Edited (KarenM90, 2/10/2020 8:13 pm)
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