API Docs / Operations / Client - MTD Annual Submissions

Client - MTD Annual Submissions

Year-end adjustments, allowances and non-financial declarations for a client's MTD Income Tax income sources. Unlike a quarterly update these are data updates rather than filings with deadlines: HMRC holds the authoritative values, a save replaces them in full, and the retrieve re-shows whatever software last sent them. Who sent or deleted a submission from Sodium is recorded separately, because HMRC's own retrieve never says.