Hello there, ljw8.
Thanks for getting back to us and providing detailed information about your concern.
I am here to assist you with importing your bills with custom fields in QuickBooks Desktop (QBDT).
To import a bill using IIF files, you can use the CUSTFLD1 - CUSTFLD5 column headings and add the information you want to import. For your convenience, you can download the QuickBooks IIF Import Kit to help you in creating and working with .IIF import files. Additionally, you can check out this article for guidance on importing .IIF files: IIF Overview: import kit, sample files, and headers.
To learn more about import features and how to ensure everything is intact after transferring them, I'm adding these resources for you:
Feel free to reach out to me anytime if you need further clarification on importing your bills in QBDT. I'm always here to help you. Have a great day ahead!
