Tacx Vortex Smart homepage
Have just discovered a way that seems to work for getting tacx data not Garmin connect. In Tacx train8ng app, select profile. There is then an option to email tcx file. I have then saved this emailed file into a folder on my hard drive. Then within Garmin connect selected upload option, highlighted tacx file and then uploaded and at first look the data appears to be all there in Connect.