Blog Making Tax Digital

How to Switch to MTD-Ready Software Without Losing Your Data

July 14, 2026 4 min read

Quick answer: To switch accounting software before MTD without losing data: pick a clean switch date (ideally 6 April), export your existing transactions and balances, connect your bank to the new software, enter opening balances, review categorisation, then authorise HMRC.

Whether you’re leaving a spreadsheet or an older package, switching feels risky ,but with a clear plan it’s straightforward. Here’s the safe migration path.

When is the best time to switch software?

The cleanest time to switch is the start of a tax year (6 April), so your new software holds a full, uninterrupted year. If you must switch mid-year, that’s fine too ,you’ll simply bring in opening figures so nothing is lost.

Step 1: Export your existing data

Pull out your transaction history, outstanding invoices and current balances. From a spreadsheet, that’s your transaction tabs; from another package, use its export function (usually CSV). If you’re coming off spreadsheets specifically, read switch spreadsheets to MTD software.

CleanBooksAI is also developing native spreadsheet uploads, so you’ll soon be able to upload your existing bookkeeping spreadsheets directly instead of re-keying information into restrictive bridging software spreadsheets.

Step 2: Connect your bank

The fastest way to populate new software accurately is a live bank feed, which pulls real transactions rather than relying on a manual import that can contain errors. This often makes a full historical export unnecessary.

Step 3: Set your opening position

Enter your opening balances so the software starts from the right place. Good software makes this a guided step rather than a manual journal exercise.

Step 4: Check categorisation

Once transactions are in, review how they’ve been categorised. With AI bookkeeping this is mostly done for you, with only exceptions flagged ,see how AI bookkeeping works.

Step 5: Authorise HMRC and go

Connect to HMRC and you’re ready to file quarterly. Follow how to sign up for MTD income tax.

Why is CleanBooks AI an easy landing spot?

Because CleanBooksAI imports transactions directly from your bank and lets Keeva™ categorise them automatically, the switch is mostly connect-and-go rather than weeks of data wrangling. Your dashboard and live tax estimate populate almost immediately, helping you become MTD-ready with minimal effort.

If you currently keep your records in spreadsheets, we’re also launching native spreadsheet uploads. Rather than copying data into restrictive bridging software spreadsheets, you’ll be able to upload your existing bookkeeping spreadsheets directly into CleanBooksAI and continue from there.

Sign up today to claim your free 6-month MTD trial and be among the first to access native spreadsheet uploads when they’re released.

If you’re weighing up bridging software against full MTD software first, see Bridging Software vs Full MTD Software.

Switch with confidence. Start your free 6-month trial today and be first to use native spreadsheet uploads.

Switch with confidence. Move to CleanBooks AI before your MTD deadline.

Frequently asked questions

When is the best time to switch accounting software?
The start of the tax year, 6 April, is the cleanest time to switch because your new software then holds a full year of data. You can switch mid-year too, by entering opening balances so no information is lost.
Will I lose data when switching accounting software?
Not if you export your transactions and balances first and enter opening figures into the new system. Connecting a live bank feed also rebuilds your transaction history accurately, reducing reliance on manual imports.
How do I move from a spreadsheet to MTD software?
Export your spreadsheet data, connect your bank to the new MTD software so transactions flow in automatically, set your opening balances, review the categorisation, and authorise HMRC. AI bookkeeping handles most of the categorisation for you. If you prefer to continue working with spreadsheets, CleanBooksAI will soon support native spreadsheet uploads, allowing you to upload your existing bookkeeping spreadsheets directly without relying on bridging software.
Do I need to import my whole history into new software?
Usually not. You typically need accurate opening balances and the current tax year’s transactions. A live bank feed can pull recent history automatically, so a full manual import is often unnecessary.

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