This happen to me last year. I filed on the 1/27/17 claimed the eic credits but my funds was not released mid feb like everyone else. What happened was there was a slight difference with the income that I claimed on my return and what was on my W2. . Mistakenly a couple numbers was switched ( for example if I entered 40,576 on my return, but my W2 stated 40,676) Eventually I got my refund about 30 days later around mid March. So yes it more than likely would take about 30-45 days maybe sooner if you did not claim Eic or CTC.
