[Keith in Iowa]

Am I not able to specify the form of payment in the course of my business? That's what Treasury says. Is that a federal law?

No, you are not able to tell the IRS how they will pay you a refund if due one. You file, and either get a check or direct deposit.

[Freedom4US]

"Am I not able to specify the form of payment in the course of my business? That's what Treasury says. Is that a federal law?" No, you are not able to tell the IRS how they will pay you a refund if due one. You file, and either get a check or direct deposit.

That wasn't my question - am I not able to specify the payment in the course of my business - Treasury says yes - and, for taxes - is it prohibited to pay federal taxes with cash?