Does any solutions for (Error code:-81594) while making subscription payment?

I'll make sure that you can pay your subscription, hegde.

The error code 81594 usually occurs when the system detects a bad company address upon renewing your subscription. To fix this, you can update your business information on the Account and Setting page. I'll show you how:

1. Go to the Gear icon.
2. Select Account and Settings.
3. Head to the Company tab.
4. Click anywhere in the Address section.
5. Make sure that the company address is correct.
6. Select Save, then Done.

If the same thing happens, there may be an issue with the browser you're using. Please try logging in to your account through a private window and make sure that the business address is correct, then subscribe again. Just press the following keyboard shortcut keys to launch the window: 

• Ctrl + Shift + N (Google Chrome)
• Ctrl + Shift + P (Firefox)
• Ctrl + Shift + P (Microsoft Edge)
• Control + Option + P (Safari)

If it's now working well, switch back to your normal browser and clear its cache to enhance your browsing experience. Other supported browsers can also help you get rid of this error. 

Additionally, I recommend reading this article to be guided in managing your billing information, payment method, and subscription level in QuickBooks Online: Update subscription info.

Feel free to get back and drop a comment on this thread if you have any other concerns. I'll be happy to help you again.