QuickBooks will not import bill payments.  That broke about 10 version years ago and they have not fixed it.

Resolution for 'check transaction type issue: 'Intuit documents a ‘BILLPMT’ by check transaction type but I am unable to successfully import into QB. Please provide iif format example that works. Thanks' available: Yes.

The check transaction type 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 check transaction type issue yourself by looking for a resolution described in the article. If it is a complex check transaction type issue or you are unable to solve the issue, you may contact us by clicking here or by using other check transaction type support options.

For more information about resolving issues related to check transaction type in Quickbooks/QBO or to get support for the issue 'Intuit documents a ‘BILLPMT’ by check transaction type but I am unable to successfully import into QB. Please provide iif format example that works. Thanks', click the link below: