I managed to get the tax reports working by going through and manually defining taxes with tax grids included. It’s a huge oversight in the Irish accounting localisation module that they’re not set at all, and means that both the tax report and VIES reporting are completely broken, just reading zero everywhere. Not great.

Annoyingly, we first set up using the Irish localisation package about 3 months before it had a huge overhaul - prior to that the chart of accounts was an absolute mess and the tax definitions were awful.

I’m afraid your best bet is for your accounting administrator to go through Accounting > Configuration > Taxes and set everything up properly, line by line. I would recommend splitting tax definitions into Goods and Services separately (i.e. 23% VAT on Goods, separate option for 23% VAT on services), and setting up tax definitions for intra-community acquisition/supply to/from Europe as well. Make sure that when defining ‘distribution for invoice’ and ‘distribution for refunds’ lines that you apply appropriate tax grids to each line (e.g. standard VAT on goods should have a base rate of 23%, with a single distribution line placing 100% of tax in a Purchase Tax control account, and a tax grid of "+T2”).

Definitely best done on a test database first and then rolled out. Good luck.