Maryland did not have the technology to accept fiduciary income tax returns (Form 504) until tax year 2022. ProSeries did not support the electronic transmission in 2022. Numerous other tax software did support the transmission in 2022. I have spoken to a few support people at Intuit and did not get a "for sure" answer that we can electronically transmit the Maryland Form 504. The Forms update section lists a bunch of fiduciary forms (ex: 504UP, 504E, 504CR). However, Form 504 is not listed. I'm trying to get an answer from Intuit. Thanks