If you have uploaded invoices to the wrong folder (Sales invoices uploaded to the Purchases folder for example) or to the wrong company you can simply move these invoices from one company/folder to another.
In the inbox, select the invoices you wish to move by checking the box to the left or using the master checkbox at the top to 'select all':
Once you have selected the invoices, click on 'Actions' and select 'Move' from the drop down menu:
A new window will pop up confirming the company name you want to move the invoices to (select from the desired company from the menu if different) and the folder you want to move the invoices to.
Please note, this feature is only available for invoices/bills. Moving invoices from Sales to Purchases or vice versa can cause some data to be lost, specifically line items or tax summaries depending on the invoice. These can simply be entered manually if this is the case.