Windows 2000(1) or later (including Windows 11) on a desktop or laptop PC - both 32-bit and 64-bit are compatible
(1)Windows 7 or later (including Windows 11) is required if submitting a VAT return to HMRC by Making Tax Digital (MTD)
You do not need Microsoft Excel unless you are using the VT MTD for Excel add-in - see below
Windows 7 or later (including Windows 11) on a desktop or laptop PC - both 32-bit and 64-bit are compatible
Microsoft Excel - 32-bit desktop version (compatible versions: 2003, 2010 to 2021, and 365(1))
(1)All Microsoft 365 plans include the desktop version of Excel, except for the Business Basic plan
64-bit Excel is not compatible (not to be confused with 64-bit Windows, which is compatible). If your PC has 64-bit Excel, you can reinstall the 32-bit version of Office/365.
Excel 2007 is not compatible.