I need some vendors to fill out a W-9, but their address is not in the USA. (even though they are US citizens) how do they can they fill it out?

Let me step in and share some info about filling out your W-9, @racheli-binyamin.

You cannot invite your vendors with a non-US address in QuickBooks since this isn't an available feature yet. However, you can let them manually fill out the W-9 form to add it to your account.

For more detailed information in inviting a contractor, you can use this article: Invite a contractor to add their own 1099 tax info.

If you have additional questions, feel free to leave a message in the comment section. I'll be around here in the Community to help. Take care, and have a good one.