There are a lot of questions and confusion surrounding the new VAT / MOSS laws and tax collection.
The UK government has out a nice flow chart you can use to see if the law applies to you: https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/390300/VAT_MOSS_Flow_chart.pdf
If you feel the law applies to you, the simplest thing you can do to collect and track this tax is to setup tax rates inside your Paypal account, which will automatically charge the tax to buyers in specific countries.
You can find the tax settings inside your Paypal account here:
(Click here to watch a video (3rd party) to learn about setting up your tax settings.)
We will continue to monitor this and add additional resources to make it easier for affected vendors to comply, as needed.