How did you enter the cheque as it sounds as if you included the vat at the time of cheque entry. The credit amount must equal the full cheque amount.?
Resolution for 'Cheque amount issue: 'VAT not showing in set credits' available: Yes.
The Cheque amount 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 Cheque amount issue yourself by looking for a resolution described in the article. If it is a complex Cheque amount issue or you are unable to solve the issue, you may contact us by clicking here or by using other Cheque amount support options.
For more information about resolving issues related to Cheque amount in Quickbooks/QBO or to get support for the issue 'VAT not showing in set credits', click the link below: