Still I can not sign in after putting the email address I clicked on sign in a different way link, then I choose email a code. Then I entered the code. Then they are ….

Hi there, aamir3.

I've got methods to help you sign into your QuickBooks Online account smoothly.

If the code from your email isn't working, it’s most likely that you’ve generated numerous codes and aren’t using the most recent one. To fix this, follow the tips below to verify your account:

• If your code doesn’t work, request another code by selecting I didn’t get an email or I didn’t get a text message.
• Delete any previous codes we sent you to make sure you use the most recent code.
• Keep the window with the code entry form open. Closing the window invalidates your code, meaning you’ll need to start over from the sign-in page to generate a new code.
• Check your email in a new tab or window, so you can keep the verification code page open at the same time.

On the other hand, please know that it may take a few minutes for your code to arrive. This could be why you aren't receiving OTP on your mobile number. Here are a few things you can do:

• You can get a new code sent to you by selecting the I didn’t get a text link on the product sign-in page.
• If you lost your phone, check your text messages online at your cell carrier’s website.
• You may have accidentally blocked the phone number we sent a text message from. Make sure to allow or unblock our number on your iOS or Android device.

For further details, you can refer to this article: Recover your Intuit Account if you can’t sign in. 

If the issue persists, I recommend getting in touch with our QuickBooks Support Team. They have the tools to access your account and be able to investigate the cause of why you can't get a code that causes you to be unable to sign in to QBO.

In case you need guidelines for effectively handling your business using QBO, you can open this article: Help guide for QuickBooks Online. It contains topics about advanced accounting, banking, and payments to name a few.

Click the Reply button if you have any clarifications or need help with QuickBooks. I’m more than happy to lend a helping hand. Have a good one, aamir3.