What is the address to mail a check to pay off your installment agreement quickly? The installment agreement is set up with direct deposit, say $100 a month. If you want to send a check for $500, how to do this? Should one use the address from 1040-V or form 9465 or something else?
Also, could one pay via EFTPS? If so, what should be the payment type and tax period?
And if you're not in an installment agreement, and filed a tax return but no money with the extension, but have come into money now and want to mail a check, what is the address?