Parolla Plugins can prepare VAT3 returns directly from your Xero data as:
If you're a "cash basis" business in Ireland you should be reporting to The Revenue on Monies Received basis, which is not an option in the Xero Sales Tax Reports.
Generate compliant payment files directly from Xero bills or Batch Payments.
Statement converters, RTD returns, VIES returns....
Please contact your Xero support and request these features get added to the roadmap.