Can't go backward if accidentally skip a field
I managed to hit enter twice and skipped the state on the last record I did, but there does not appear to be a way to go backward to either add or correct a field. Really feeling the lack of a talk option on the item page.
You can just click the "1/9" or whatever numbers beside "Finish this record" and you'll see a popup of the available fields and can revisit any of them.
If you already submitted the entire record, it can't be revisited for corrections.