A VAT return is the monthly confession of a registered business. Each return reports the value of taxable supplies made, VAT collected from customers, VAT paid on purchases and the resulting net amount, whether payable to the department or carried as credit. Filing happens through the IRD portal against the tax period, and the system reconciles the figures with payments. The tax scheme depends on this document. Output tax collected must be paid to the government regardless of whether customers have paid you, while input tax on purchases is netted against the output figure for the period. The return therefore punishes late payment far more than late collection, because the state wants its share of the value you added on time. Officers look first at consistency: whether the turnover matches the amount deposited, bank records and sometimes invoices. Missing a return even with nothing to report is treated as noncompliance, so an honest nil return beats a silent month. Keeping the filing habit regular is the entire strategy, because a register of clean monthly returns is the cheapest insurance against intervention.