Upload my MYOB File

I think there are a few ways - one would be to back up the offline file (save somewhere on your desktop) and then go into the online file and restore over it - click on file - restore - select file to restore and go from there 

or use the instructions here - https://help.myob.com/wiki/display/ar/Restore+your+company+file#expand-Torestoreabackuponlinetoreplaceyouronlineworkingcompanyfile

Regards

Samantha