Simply Accounts Making Tax Digital VAT Windows accounting software for small businesses recognised by HMRC with a free 14 day trial. Simple, cheap, easy to use and well tested. This is a Windows desktop computer accounting software application where you have control over your own data and are not reliant on having to be connected to the internet. Simply Accounts provides all the accounting tools you need - a comprehensive package with a straightforward application. Simply Accounts is recognised by HMRC for the electronic submission of both VAT (XML) and VAT (MTD) Returns.