"Not many professionals are well versed with the frequent changes being made on the portal, very less time has been provided after the introduction of the new portal, frequent changes in various 'Forms' and their utility is resulting in duplication of work, due to which a lot of time gets wasted. Many technical glitches are being faced on the portal due to which a lot of time gets wasted. Overlapping of dates for various compliances like due date of filing of income tax returns, GSTR 9, GSTR-9C are another complex issue," CAIT said.