In order to manually archive your invoices you will need to do the below:
Click the tick boxes next to the invoices in the inbox. You can click these individually or you can select all by using the tick box next to Actions.
After you select your invoices you will need to click the Actions drop down menu where you will get the option to Archive your invoices. (You will also be able to Reject, Move, and Publish the invoices here)
Once you select Archive your invoices will move to the archive folder. This feature is ideal for keeping your inbox clear.
If you would like your invoices to automatically move to the archive folder after publishing to your accounting software you can check out this article here.
If you would like to un-archive your invoices, click here.