Getting good advise from a tax accountant is prudent. Not renewing accounts or liciences would be obvious, but after doing now a couple times I've never had any problems. Just ticked the non-residence box and date of departure on filing of taxes. The less paperwork the better. From memory, if your gone at least three years then it should be no questions asked. Medical card cancelation would be a good idea as well, and shows legitimate non-residence and proof of intent. Sounds like you shouldn't anything to be concerned about.....except the ex