Long story short, moved very far last year, near the end of the year. In the process, I've more than doubled my AGI, but as I started my new employment in November, I still have a low enough AGI that I'll get refundable credits, and claiming the moving expenses for last year has essentially no effect on my return. However, I'll end up paying quite a bit this current tax year, so it would be awesome to claim those moving expenses against 2017's return.
I can find quite a bit of info on claiming this late, but nothing about claiming this in a year different from when the moving expenses occurred. Thanks in advance!