If he doesn't show signs of addressing them before they're due, I would just send something in email/txt that basically just says "Hi. We need to figure out what we're doing about taxes/phone/etc. Let me know what you would like to do about them."
Puts the ball in his court, doesn't sound like you're using it as an excuse to talk to him, etc.
M:26 H:32 T:8yrs ILYBNILWY/ "I'm not happy": 2/6/16 D-Day-discovered PA/EA: 2/10/16 Separated: 2/14/16 He's living with OW I moved to different state: 06/16 Currently: Trying to move forward