This new overhead seems unstoppable now.Please be careful when responding to emails asking you to sign up. Basically only deal with your accounting software supplier directly. E.g. TAS/Sage/ Quickbooks etc. Even with mtd there are firms trying to charge fees, when nothing is needed.And also resist signing up until forced to. There is no advantage to you in adopting early, and the later you adopt, the more chance there is that the software will be bug-free, and the support staff expert in resolving problems.HMRCy in their infinite wisdom, have made it a one-way only transfer when you sign, so you LOSE any ability to use the old system if you have problems. No going back!