This article will describe how to post that you deposit an amount from your cash/cash balance into your bank account.
Please note that this is not your private cash, but the company's cash balance. This could be cash from a cash register, for example.
In addition, we assume in this article that you already have a cash balance that has been posted to on an ongoing basis.
Move the cash to the bank
Go to Accounting > Journal
Click on + Add journal entry
Select a date
Write a good description, you can use "From cash register to bank"
In account, write the number of your cash-account
Write the amount in the Credit field
Select your bank as the offset account
Click on Approve all
Now you have recorded that you have moved an amount from the cash balance to your bank account.