I moved abroad in August 2016. I'll meet the Physical Presence Test in July 2017, so I'm planning on requesting an extension until October. Right now, my foreign earned income isn't excluded, so (for example) my estimated tax payment is $3000. After my foreign earned income is excluded, I expect my tax payment to be less. I know I still have to pay by April 15. My question is: do I pay the full $3000 and then get a refund when I file in July? Or should I wait to see if I owe anything in July? Thanks!
