What the RTD asks for
The RTD restates your year by rate. Sales go into bands for each Irish VAT rate, along with zero-rated and exempt supplies, and purchases are split in the same way. EU and import figures are reported too. All amounts exclude VAT, so they are the net values behind the VAT on your bi-monthly returns.
Revenue uses the RTD to compare what you charged at each rate with what businesses like yours usually charge. A café whose sales are almost all at the standard rate, or a builder with no reduced-rate work, will stand out.