My college deposit is by tomorrow April 15th can I send it on exactly on that date or do I have to send it like right now(april 14th)
You should be fine either way but just to be safe, I would have it postmarked by tomorrow.
Postmarked? I thought most are by electronic payment these days.
If electronic payment then fine. We used a good old fashioned check in the mail.
If by mail, you better send it in early or with tracking. Otherwise, you are not sure if they receive it or not. If you send a check early, you can tell when it is cashed/deposited. Electronic payment is recommended whenever available, particularly if you want to wait till the last day.
Agree with the previous comments that electronic payment, if available, is best. If sending by mail I would suggest emailing the university letting them know you accepted their offer, are looking forward to attending, and mailed your acceptance and deposit.
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If snail mailing, definitely do so in a way that you can prove you put it in the mail no later than the 15th (eg certified mail).