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Nothing in W-2 box 17 and 18 but need more detail about same question. Since there is no FL state income tax, I just want to check if the Turbo Tax or IRS system will flag an error if we do enter the state information in box 15 (FL) and box 16 (state wages) ?  I'm trying to determine if it is better to enter it exactly as the W2 says with the information in box 15 & 16 in order to not trigger an error...or if it is better to do as mentioned here and leave those boxes empty to avoid triggering an error. Or if it matters either way!