For questions about a past due account, an unfiled tax return, an "X" appearing in the upper left hand corner of your return, to make payment arrangements or if you have questions about a City of Phoenix sales tax lien, call (602) 262-6785, Press 7, TTY (602) 534-5500. You will be connected to the collection representative assigned to your account. Please have your eight digit city of Phoenix Privilege Sales Tax License number ready