There is no specific place to record a supplier’s VAT number within QuickBooks Online. You could record this in the Note box, or the account no. box as a workaround.
Resolution for 'account no issue: 'Where do I record Supplier’s VAT numbers?' available: Yes.
The account no issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the account no issue yourself by looking for a resolution described in the article. If it is a complex account no issue or you are unable to solve the issue, you may contact us by clicking here or by using other account no support options.
For more information about resolving issues related to account no in Quickbooks/QBO or to get support for the issue 'Where do I record Supplier’s VAT numbers?', click the link below: