In Sage 50cloud Accounts v25.1 a new feature was introduced to help you with VAT audits and Making Tax Digital (MTD). If you need to make an adjustment to the figures on your VAT Return, you can now add supporting documentation to explain the adjustment you have made.
The attachments can be up to 5mb in size and they're stored with your Accounts data. They're for reference purposes and not submitted to HMRC with your VAT Return.
To add an attachment
For more information, refer to this feature's Ask Sage article.