Upload a payment receipt
Upload proof that you paid the tax authority for a filing, as multipart/form-data with the file in the file part. Kintsugi reviews the receipt before completing the filing. The filing's status does not change. A filing takes at most 20 receipts. Send an Organization-Id, Connection-Id or Entity-Id selector to say which organization the filing belongs to.
The file must be a PDF, PNG or JPEG of at most 10 MB. Returns 404 if the filing does not exist or belongs to an organization your credential cannot access, 409 if no payment instructions were sent for the filing, the filing is not waiting for payment or it already has 20 receipts, 413 if the file is too large, and 422 if it is not a PDF, PNG or JPEG.
Authorization
Headers
Release date, as YYYY-MM-DD. Defaults to 2026-07-21.
Target organization id (Organization-Id selector).
Target connection id; resolves to its organization.
Platform entity id; resolves to a connection's organization.
Optional source to disambiguate an Entity-Id.
Path parameters
The unique identifier of the filing.
Response
Attachment id of the receipt. Download it through the attachments API (GET /attachments/{id}/download).
Name the file was uploaded under.
When the receipt was uploaded, as an RFC-3339 UTC timestamp.
Successful Response
The request was invalid.
Authentication failed or was missing.
The credential is not permitted for this request.
The requested resource was not found.
The request conflicts with existing state.
The request body is larger than this endpoint accepts.
The request failed validation.
A service this request depends on was unavailable. Retry the request.