The deteriorating performance of HMRC’s self assessment pre-population API has cast further doubts on the tax authority’s ability to deliver a smooth landing for its Making Tax Digital for income tax self assessment project.
Accounting practices currently filing client returns ahead of the 31 January tax return deadline have flagged a decline in the performance of HMRC’s self assessment (SA) pre-population application program interface (API) service, with several outages and a reduction in successful data retrievals compared with previous years. “I ran the SA API for partners in three partnerships yesterday,” …