Connect your existing accounting system to HMRC MTD

If your existing accounting system is not MTD-compliant, there are two ways to create a compliant digital link to HMRC using My Tax Digital.

File-based digital link (bridging)

If your system can export figures to a spreadsheet, populate the relevant HMRC bridging template — SA103 (Self Employment), SA105 (UK Property), SA106 (Foreign Property), or the Transactions template for VAT — with cell references back to your own export file, then upload it via My Tax Digital's import screens. Because the figures are linked by formula rather than retyped, this satisfies HMRC's digital link requirement. See the Self Assessment and UK Property guides for the exact import steps and template downloads.

Direct integration and APIs

My Tax Digital does not currently offer a published or self-serve API for other accounting software to send data to it or through it to HMRC. For most systems, the file-based digital link above is the supported route and meets HMRC's digital link requirement without any development work.