Edit>preferences has a setting that will remember the last transaction.

You can also edit your vendor and set it to a preferred acct.

Resolution for 'auto fill issue: 'How do I turn on auto fill for expense accounts when I write bills? So when I pull up a vendor it fills in the account category every time?' available: Yes.

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

For more information about resolving issues related to auto fill in Quickbooks/QBO or to get support for the issue 'How do I turn on auto fill for expense accounts when I write bills? So when I pull up a vendor it fills in the account category every time?', click the link below: