MTD Digital Links: Connecting Your Records

Making Tax Digital has changed how businesses keep and submit their tax records, but one requirement continues to cause confusion: digital links. HMRC insists that the transfer of data between different software programs, applications, or products must be digital, with no manual re-typing or copy-and-pasting allowed. Understanding what this means in practice is essential for staying compliant.

I'm Penny, your AI bookkeeper at Accounted, and I'll explain what digital links are, why HMRC requires them, and how to set them up properly so your MTD submissions are fully compliant.

What Are Digital Links?

A digital link is an electronic transfer or exchange of data between software programs, products, or applications. The critical point is that data must flow digitally from one place to another without manual intervention. HMRC's definition is deliberately broad to accommodate the wide variety of ways businesses keep their records.

Under MTD, you must maintain digital records and submit VAT returns (and eventually income tax returns) using MTD-compatible software. If your digital records are spread across more than one piece of software — for example, a spreadsheet for recording sales and an accounting package for submitting returns — the data must travel between them via a digital link.

What counts as a digital link includes importing and exporting CSV or XML files between software, automated data transfers via API connections, linked cells in spreadsheets that pull data from other worksheets or workbooks, and emailing a spreadsheet that is then imported into another program without manual re-entry.

What does not count as a digital link includes manually typing figures from one program into another, copying values from one spreadsheet and pasting them into another using copy and paste, and reading numbers from a screen and entering them elsewhere. These manual processes break the digital chain that HMRC requires.

HMRC's full guidance on digital links is published in their Making Tax Digital for VAT guidance, which covers the requirements in detail.

Why Digital Links Matter

The purpose of the digital links requirement is to reduce errors. HMRC's research found that a significant proportion of tax errors stem from manual data handling — mistyping a figure, transposing digits, or accidentally omitting entries when transferring data between systems. By requiring digital links, HMRC aims to create an unbroken digital trail from the initial recording of a transaction to the final figure on your tax return.

For businesses, this has practical implications. If you currently use a spreadsheet to record your transactions and then manually type the totals into your VAT return software, that process does not comply with MTD. You would need to either import the spreadsheet data into the VAT software using a file transfer, use bridging software that reads your spreadsheet directly, or switch to an integrated system that handles both record-keeping and submission.

The digital links requirement applies to all stages of the data journey. If you record sales in one system, purchases in another, and then combine them in a third system before submission, every connection between those systems must be a digital link.

If you're looking for an overview of how MTD applies to your business more broadly, our guide on MTD compliance for practices provides useful context.

Common Digital Link Scenarios

Let me walk through several common scenarios to illustrate how digital links work in practice.

Scenario one: Single software solution. If you use one piece of MTD-compatible software for all your record-keeping and VAT submission, digital links are handled automatically within the software. There's nothing extra you need to do. This is the simplest approach and the one I'd generally recommend.

Scenario two: Spreadsheet plus bridging software. Many sole traders and small businesses prefer to keep their records in spreadsheets. This is perfectly acceptable under MTD, provided you use bridging software that can read your spreadsheet and submit the VAT return data to HMRC. The connection between your spreadsheet and the bridging software must be a digital link — typically achieved by the bridging software reading the spreadsheet file directly.

The key requirement here is that you do not manually type any figures into the bridging software. The software must pull the data from your spreadsheet automatically. Many bridging software products work by reading specific cells in your spreadsheet, so you need to ensure your spreadsheet is structured in the way the bridging software expects.

Scenario three: Multiple spreadsheets. If your records span multiple spreadsheets — say, one for sales and one for purchases — the data must be linked digitally. In Excel or Google Sheets, this means using cell references that link to cells in other workbooks or sheets. For example, a summary sheet could use formulas like ='[Sales.xlsx]Sheet1'!B10 to pull in data. These formula-based links count as digital links.

Scenario four: Spreadsheet plus accounting software. If you record transactions in a spreadsheet and then import them into accounting software, the import process (typically via CSV file) counts as a digital link. However, downloading data from your accounting software and manually entering it into a spreadsheet would not count.

Scenario five: Multiple software applications. Some businesses use different software for different functions — perhaps a point-of-sale system, a stock management system, and an accounting package. Data flowing between these via API integrations or automated file transfers constitutes digital links. Manual transfers do not.

Setting Up Digital Links Correctly

If your current processes involve any manual data transfer, you need to address this to comply with MTD. Here are the steps to follow.

First, map your data flow. Draw out every system where you record, process, or store financial data, and identify every point where data moves between systems. This gives you a clear picture of where your digital links are and where gaps exist.

Second, identify any manual transfer points. Look for places where someone types figures from one system into another, or uses copy and paste. These are the points that need to be replaced with digital links.

Third, choose your solution. For each manual transfer point, you have several options: set up an API integration between the two systems, create automated file exports and imports (CSV, XML, or other formats), use formula-based links between spreadsheets, or consolidate into fewer systems to eliminate the transfer point entirely.

Fourth, document your digital links. While HMRC doesn't require formal documentation of your digital links, having a record of how data flows through your systems is invaluable if you're ever asked to demonstrate compliance during an inspection.

HMRC provides specific guidance on acceptable digital links in their VAT Notice 700/22, which is the definitive reference document for MTD for VAT.

Penalties for Non-Compliance

HMRC has been relatively lenient in enforcing the digital links requirement during the early stages of MTD, but this grace period has now passed. If HMRC inspects your records and finds that data is being transferred manually between systems, they can issue penalties.

The penalties for failing to maintain digital records or digital links fall under the broader MTD penalty framework. HMRC may issue a warning for a first offence, but repeated non-compliance can result in penalties of up to £400 per offence. More significantly, if manual data transfers have led to errors on your VAT returns, additional penalties for inaccurate returns can apply.

The best way to avoid any issues is to ensure your digital links are in place and working correctly. If you're unsure whether your current setup is compliant, consider booking a compliance check with an accountant who specialises in MTD.

Simplifying Digital Links with the Right Software

The easiest way to handle digital links is to use software that manages everything in one place. When your record-keeping and submission happen within the same system, digital links are built in and you don't need to worry about them.

Accounted is designed with MTD compliance at its core. Your transactions are recorded digitally, calculations happen automatically, and submissions go directly to HMRC — all within a single system with no manual data transfers required. For more on how our approach compares to using spreadsheets, see our guide on moving from spreadsheets to software.

If you want MTD compliance without the headache of managing digital links across multiple systems, check out our pricing and see how Accounted can simplify your tax obligations.

Accounted handles your MTD ITSA submissions automatically, with direct HMRC filing built in. See how MTD works in Accounted →