File VAT without leaving your spreadsheet.

Yes — as long as adjustments are clearly labelled in the working file and kept on record for at least six years, as HMRC requires.

Every new account gets one VAT return filed free, on any tier, with no card details needed up front.

No. Only the nine VAT box figures are sent to file your return. Your underlying working file and its data stay with you.

Yes. If you keep your invoices, bills and other records in Clients Assistant, the VAT Return page works out the nine boxes from them, on standard, cash or flat rate accounting, and you file the return with HMRC from the same page. No spreadsheet needed.

Yes, provided your source file already calculates the correct figures for boxes 1 through 9 — Clients Assistant files whatever those boxes contain.

Any recent version of Excel or a compatible spreadsheet application. Clients Assistant runs in the browser, so it works on any operating system.

Yes. An admin invites each person by email from the Users page. They accept by creating an account, or by signing in with an existing Clients Assistant account. They can then prepare and submit the business's VAT returns with you. Each plan includes a set number of users per company; a company without a subscription has only the person who set it up.

Your account is protected by your password, and you can add two-step sign-in for free. Turn it on under Settings > Business Setup > Sign-in Security: after your password, you enter a 6-digit code from an authenticator app on your phone, such as Google Authenticator or Microsoft Authenticator, so someone who learns your password still can't sign in. It's optional, and you can turn it off at any time. If you lose your phone, an admin of your company or Clients Assistant support can reset it, and we email you whenever that happens.