IPT07230 | Accounting for Insurance Premium Tax: IPT Accounting Provisions: IPT Return Forms
From HM Revenue & Customs · Insurance Premium Tax
IPT Returns (Form IPT 100) are submitted on-line by:
insurers,
agents (appointed by overseas insurers), or
IPT groups
who should log into the online account and complete the return in accordance with the notes on the form. The return will cover a period of three calendar months. Information can be found at https://www.gov.uk/government/publications/insurance-premium-tax-send-your-online-return-ipt100
The return must be submitted by the due date within a month of the end of the period covered by the return. Therefore, the insurer or their agent has a month to complete and submit the return.