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The company’s settings and setup such as your vendors’ Tax Id numbers don't come over during the conversion process. Manually enter them in the Vendor Information screen in QBO. Please know you'll have to input the information one at a time.
Here’s how:
- Go to the Expense menu on the left panel to select Vendors.
- From there list, click on the supplier’s name to view more details.
- Tap the Edit button to open the Vendor Information screen.
- Navigate to the Business ID NO. section to input the tax ID number.
- Click Save.
This guide provides more insights about modifying customers and vendors lists: How to edit, delete, and restore list elements.
Additionally, this guide contains links to help get acclimated about the product’s features and processes: Getting Started With QuickBooks Online.
Don’t hesitate to visit the Community again if you have questions or concerns about QuickBooks. I’m always ready to help and make sure you’re taken care of. Have a good one.