Good day, @Melfie,
Allow me to share more details about setting up the W-9 information if you don't have a Social Security Number (SSN).
Yes, you can Tax Identification Number or TIN when filling out the W-9 form. However, if you get an invalid number error, try replacing it with all zeros following the same number format.
I'm adding an article about 1099 set up in QuickBooks Self-Employed: 1099s in QuickBooks Self-Employed
Please update me on the outcome by clicking the Reply button below or if you have other questions. I'm always here to lend a hand.