Hi. Just to be clear: If you are talking about editing OSM with QGIS, Jochen simon's answer is of course correct, JOSM is the best tool for that. However, if you just want to download OSM data to use in QGIS for other GIS work, the QuickOSM plugin for QGIS works well to get the data out of OSM, but not back in to OSM. (Tested with QGIS 2.6 and 2.8) The LearnOSM webpage is out of date and needs to be redone using the QuickOSM plugin instead of the outdated OpenStreetMap plugin, which only partially works. Cheers

Hi. Just to be clear: If you are talking about editing OSM with QGIS, Jochen is of course correct, JOSM is the best tool for that. However, if you just want to download OSM data to use in QGIS for other GIS work, the QuickOSM plugin for QGIS works well to get the data out of OSM, but not back in to OSM. OSM. (Tested with QGIS 2.6 and 2.8) The LearnOSM webpage is out of date and needs to be redone using the QuickOSM plugin instead of the outdated OpenStreetMap plugin, which only partially works. Cheers

Hi. Just to be clear: If you are talking about editing OSM with QGIS, Jochen is of course correct, JOSM is the best tool for that. However, if you just want to download OSM data to use in QGIS for other GIS work, the QuickOSM plugin for QGIS works well to get the data out of OSM, but not back in to OSM. The LearnOSM webpage is out of date and needs to be redone using the QuickOSM plugin instead of the outdated OpenStreetMap plugin, which only partially works. Cheers