[Bukem_]

Banks typically work on two business days. They usually switch over at 2 pm or so. Technically you are allowed to deposit up to exactly 10k before the day switches, and then another 10k on the next business day.

But most bank employees will find this suspicious, and they can file a suspicious activity report if they feel like it.
SOme bankers are very very very paranoid, cause if anything fraudlike happens on the watch it can go on them.

I don't know how much cash you have, but just stick it in one lump sum(you may want to call the bank ahead of time to arrange this if its a small branch). Or just stick in 5-7k a week. Provided you file your taxes appropriately neither of these should case any issue.