Hi @rmpruneda,
Currently, we're unable to customize an item in QuickBooks Self-Employed. You'll want to add your item specification in the description column. Let me guide you how.
- Go to Invoices.
- Then, select Create invoice.
- Enter the invoice information and choose your Product or Service.
- Manually type your item specification under Description and choose By item from the drop-down.
- Add the Amount. Hit Preview or Send.
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If there's anything else you need help with, please don't hesitate to reach out. The Community is always here to help. Thanks for posting and have a wonderful day.