If I write a check where the funds wont be available until tomorrow, will it overdraft or clear?

My bank account has A dollars in it with B dollars deposited and pending available for use tomorrow.I need to write a check for rent and turn it in to

My bank account has A dollars in it with B dollars deposited and pending available for use tomorrow.
I need to write a check for rent and turn it in today for the amount A+B
How long does check processing take?
Will my landlord be able to deposit this check today or will it bounce or be invalid at his bank?

or:My bank account has A dollars in it with B dollars deposited and pending available for use tomorrow.I need to write a check for rent and turn it in today for the amount A+BHow long does check processing take?Will my landlord be able to deposit this check today or will it bounce or be invalid at his bank?


or:well it might not make it to the bank today because the day is almost over so i think the land lord will deposit it tomorrow which i'm sure that it gets processed through his bank then it goes to yours to be paid so i think it will be fine and he'll deposit it tomorrow

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