Thank you for contacting Community.
The VAT codes listed on QuickBooks are set as default based on HMRC's tax code system. A short description of the tax codes can be found on the QuickBooks Taxes page. If you click Taxes on the left of the screen and then click the drop down arrow next to Edit VAT in the top right corner, you will have the option to Edit Rates. Here you will find a list of descriptions for the current rates active on your QuickBooks Online account.
If you have any further queries regarding specific VAT codes, I would recommend speaking directly with HMRC's VAT department, their contact number is 0300 200 3700.
Let me know if you have any queries. Or, if you'd like to go through this over the phone, you can call our dedicated team who will be happy to assist you. Our contact details can be found here along with our opening hours.