Following the recent announcement in Ireland for changes to VAT rates between the period of September 2020 and February 2021, it’s worth noting that the VAT rates can also be amended in Protean to reflect this.
If you fall within the parameters of these changes, you can amend your existing VAT rate setup so that you simply have an amended rate between the specified period.
In Protean, head to: System > Accounts > VAT Rates
Then, highlighting the relevant VAT rate, click the […] button and specify the date range for which the VAT rate will be amended from as below.

The tax point date of any transaction within this period will then pick up the amended rate as intended.