When I click to subscribe to Quickbooks it is giving the following error. I've tried to clear the cache and open anonymous window. Shows the same error Error code:-81594

I appreciate you for performing some troubleshooting steps to remove the error message you encountered when subscribing to QuickBooks Online (QBO), @finance105.

The error code 81594 usually appears when you'll be re-subscribing to QBO and the system detects that the address is incorrect. Let's go to the Account and Setting page to update your company address. This way, you can start managing your business and monitor its progress.

1. Go to the Gear icon.
2. Select Account and Settings.
3. Go to the Company tab.
4. Click anywhere in the Address section.
5. Update your Company address and all the needed information.
6. Select Save, then Done.

I've attached screenshots below for your reference.

Once done, go to the Billing & Subscription tab, then select the Subscribe button. For the detailed steps, kindly refer to this article: How to resubscribe or reactivate QuickBooks Online.

You can easily update your credit card info, upgrade your subscription, or make other changes to your account through the Billing & Subscription tab. To learn more about it, kindly refer to this article: Update your billing and subscription information.

Please let me know if you have other concerns. I'm just around to help.