I am having the same issue. Just finished my Federal and Maryland, set up for e-file, confirmed to pay $117 to TurboTax to file and I cannot efile my Maryland return with my federal because forms 502, 502B 1, 502SU, and Infor Worksheet are not ready for processing, but I am not sure why they are not ready when I was able to go through the whole process and review without issue. Hoping there isn't an issue with my return. A little upset to pay the extra fee :(
