v1
latestOpenAPI 3.0.32026-07-13105113.9 KBCreate and Amend Quarterly Period Type for a Business
This endpoint enables you to create and amend the type of quarterly reporting period used for a business for a specific tax year. You can choose standard quarterly periods (where the first period is 6 April to 5 July) or calendar quarterly periods (first period 1 April to 30 June) for each tax year. Note that the quarterly period type cannot be changed after a submission is made for that year.
Warning: If an invalid tax year or invalid business ID is submitted, the service will return a RULE_REQUEST_CANNOT_BE_FULFILLED error response. Only the current tax year is allowed and business IDs must relate to a self-employment or property income source.
Test data
Scenario simulation using Gov-Test-Scenario headers is only available in the sandbox environment.
| Header Value (Gov-Test-Scenario) | Scenario |
|---|---|
| N/A - DEFAULT | Simulate a successful response. |
| BUSINESS_ID_NOT_FOUND | Simulates the scenario in which the business ID is not found. |
| BUSINESS_ID_STATE_CONFLICT | Simulates the scenario in which the request conflicts with the current state of the business ID. |
| QUARTERLY_PERIOD_UPDATING | Simulates the scenario in which the quarterly period type cannot be changed when a business commencement date falls between 1st and 5th of April, and the current date is also within that date range but later than the business commencement date. |
| STATEFUL | Performs a stateful create and update. |
Path parameters
National Insurance number, in the format AA999999A
A unique identifier for the business income source. It must conform to the following regex: ^X[A-Z0-9]{1}IS[0-9]{11}$
The tax year for which a quarterly period type is being set.
Headers
Specifies the response format and the version of the API to be used.
An OAuth 2.0 Bearer Token with the read:self-assessment scope.
Only in sandbox environment. See Test Data table for all header values.
Request body
Example request
{
"quarterlyPeriodType": "standard"
}Response
Success(No Content)