Tax returns that add up the first time.
Tax is calculated on every line, booked to the right accounts and summarised into the return for your country. File, lock the period, and nothing can change it afterwards.

VAT and tax, in detail.
Tax codes per country
Standard, zero-rated, exempt, out of scope and reverse charge, each linked to its tax accounts. UAE codes live today.
Return from the ledger
The return is built from posted entries, never typed in, so it always matches your books.
Pre-filing checks
Missing tax numbers, unusual rates and unposted documents are flagged before you file.
Locked once filed
Mark the period filed and it is locked; late items go to the next return with a clear trail.
Rules are settings
Rates, thresholds and deadlines are configuration, not code. When a law changes, One changes without a reinstall.
Corporate tax ready
Profit by period, adjustments and the figures your adviser needs for corporate tax (UAE 9% regime and others).

Three steps, no retyping.
Set your registration
Tax number, period (monthly or quarterly) and first period.
Work normally
Invoices, bills and expenses carry tax codes automatically.
Review and file
Check the return, file with the authority, lock the period.
Same ledger, connected modules.
Questions people ask
Does One file the VAT return for me?
One prepares the return and the supporting reports. You or your tax agent submit it on the tax authority portal (for example EmaraTax in the UAE).
Which countries are supported?
UAE VAT is first (tax codes live now, VAT 201 in v0.2). Saudi Arabia, Oman, Bahrain, India GST, the UK and EU VAT follow as country packs. Rates can already be configured for any country.
Does it handle reverse charge on imports?
Yes. Reverse-charge tax codes post both output and input tax so the net effect is correct and visible on the return.
Can I see what changed after I filed?
Filed periods are locked. Anything dated in a filed period is blocked, and the audit trail records every attempt.
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