So this happened to someone I know…
They were hired at a startup, as a permanent employee. Startups being startups (and this being a pretty disorganized one even by standup standards) the founder was not organized enough to have a payroll system running before they started, so their first couple of pay periods were paid directly from the founders personal account with no withholding etc. At the time they asked the founder if they should be paying estimated tax on them but never received an answer (I realized the IRS doesn’t care about this and it’s on them to pay the estimated taxes regardless)
From day one they were absolutely a permanent employee, there was never any discussion of contracting or contract-to-hire. This was purely about the founder not having his sh-t together and sorting out a payroll system before they hired someone. After those couple of pay periods they did sort out a payroll system and they were paid via a regular paycheck with withholding etc.
About a year later they were laid off in a particularly crappy manner. At the start of the year they were sent a W9 to fill in for those pay periods they were paid directly without withholding.
If they were feeling vindictive could they refuse to fill in the W9 and say “no I was never a contractor, I was a permanent employee”. Would that have any effect on the company at all or just screw up their own taxes?
Note this is purely hypothetical, in reality they did the sensible thing: cursed them out under their breath, sent the W9, paid the (now late) estimated taxes and moved on with thier life.
In FQ as looking for the factual answer on the result of refusing to fill in a W9 not opinions on who is at fault.