When you click on the Reports button located at the left side of the bottom menu, you can see an overview of your expenses for, sorted by tax year and the expense categories in your tax form.
By default, when you open that section, information about the current tax year will be presented. If you want to change this, just tap on the slider at the top part of the screen and select the previous - 2016-17 tax year.
When you tap on a category, you'll see some useful information on what you can and can't claim as an expense within this category. It will also present the category total - meaning the total amount of expenses you have under this category.
In the Reports section, you can also see a list of all of the Tags you've used, sorted by the time they were added. The tag you added first will be displayed at the top of the list. Here you can see how to tag a receipt.
If you want to export this data, just tap on the downward pointing arrow at the top right corner of the screen. Then you can choose between the different types of reports 1tap offers - PDF Image Export, CSV Export or Tax Form. For more information about the Export feature, please see here.