You should be using that item set up as you see in my attachment:

Two Sided.

You are flowing your Purchase info through Income accounts, and this is your Mistake in your set up. Look at the box the checkmark, in my screenshot.

When you save this change, QB will offer to […]

Resolution for 'always asks issue: 'The PO always asks about income account.' available: Yes.

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

For more information about resolving issues related to always asks in Quickbooks/QBO or to get support for the issue 'The PO always asks about income account.', click the link below: