If you use Google Chrome as a browser and sync/personalize it with a gmail address you can use 'Chrome Remote Desktop' for free! It's not as robust as TeamViewer or LogMeIn but I use it in concert with a cloud storage service (DropBox) and find it to work perfectly. QBs really should have a remote access protocol built into the accountant's version but they want to sell everyone a subscription to their online products.
https://chrome.google.com/webstore/detail/chrome-remote-desktop/gbchcmhmhahfdphkhkmpfmihenigjmpp?hl=...
Best of luck
