Anyone wishing to claim expenses in the tax declaration must usually prove this as well. The easiest way to do this is with the corresponding document.
You can use the fileeeBox to scan all paper documents and find them in seconds. It is important to provide all the documents, which might be important for your tax declaration, with a suitable tag, such as "Tax 2016". By doing that, you don't have to buy an extra fileeeBox for your tax declaration. Instead you can use it for all documents.
When you submit your tax return, you can have all relevant documents displayed over the tag. You also have the option to mark them and then forward them to your tax adviser. If an original is needed, simply click on the document and display the position in the box.
This saves you the annoying search and helps claiming all your expenses!