My NJ State Return has been "processing" . I just called and was told because they need proof of income etc. copy of W2 . why does turbo tax not inform you about this?

My return has been processing for almost a year now... I just called today and was informed that since I efile, I need to submit proof of income such as w2, 1099 etc. before they process my refund.? Am i doing something wrong on turbo tax? Every state taxreturn / refund is in processing still all the way from 2018-currently. i dont understand?