Why monthly beats quarterly
A quarterly VAT filer who closes monthly has two clean months before the return is even due. Errors are found while the people involved still remember the transaction. A mis-coded AED 9,000 laptop is easy to fix in the month it was bought and painful to trace eleven weeks later.
Monthly numbers also make better decisions. An owner who sees gross margin slip from 31% to 26% in April can ask why in May. One who sees it in July has lost a quarter.