I am trying to post a simple cheque, but in the "bank" field, I have no option to select my the bank account (field is empty)

Hi there, 

I know how important it is to write cheques in QuickBooks Online with ease. Creating cheques lets you track expenses, and helps organize your chequing account and bank statement reconciliation. I'd be happy to explain what may be happening if you don't see any bank accounts in the drop-down menu. 

It's possible you may not have any bank accounts set up in your account. If you'd like to sync one to your bank feed for automatic uploads, follow the steps here: Connect bank and credit card accounts to QuickBooks Online. 

If you'd like to enter a bank account in your Chart of Accounts, simply click Accounting > Chart of Accounts > New. You'll simply select Bank from the account type menu.

If you've already added a bank account and you're still not seeing any options appearing in the Bank selection drop-down menu, try clearing the cache and cookies in your web browser to remove any stored Internet files. These stored files can cause bugs in QBO and other sites. Here's how to clear them: Clear cache and cookies to fix issues when using QuickBooks Online. 

If the issue persists, try using an Incognito window in Google Chrome. This is a private browsing mode that operates separately from the main browser, and it doesn't get impacted by stored cache and cookies. Here's more information about that and how to use it: Browse in Private. You should also try using multiple different browsers.

I hope this helps get you back on track. If you have any other questions, our tech support team is standing by to help. 

Have a great day.