I've had a green card since 2013. In 2015 I left the US for 6 months, returning Dec 1st - so I'll have been in the US continually for 5 years this Dec. I'd like apply for citizenship, and file early, because the application cost is almost doubling on Oct 2nd, but I can't find a field in the N400 form which allows me to specify my file date as Dec 1st 2020. How do I say, "I'm filing now, but I'm not eligible until Dec 1st" - or am I missing something?