By accident I clicked on UPGRADE TO BUSINESS ACCOUNT in paypal and now paypal wants my credit card info and other personal info again. I had a regular account, is there a way to cancel the business account and return to the regular account type?
There should be a Downgrade button somewhere and if not, you can just contact them to have it reverted.
If you can not have it reverted by contacting them, you are allowed one business/premier account and one personal account. Just create a new personal account. I think you can not downgrade only an option to close the account.
It might be more expensive but it allows you to accept payments from Paypal members paying using a Credit Card. I find that quite a lot of them are doing that even if it is just for $15. What I have is a Personal Paypal account and a Business Account, I will get those paying via Credit Card to pay me through my Business Account and those doing a paypal to paypal transfer to send to my personal account. This way you save on the charges of the personal account. I do tag a few dollars discount for those paying me from their paypal account and no one minds. Go to Help and type in 'Downgrade Account', it will tell you to use the Contact Form to request for a downgrade.
I have downgraded my account, it allows you to do it. just send support an email and it should be done. After i downgraded they sent me an email saying if you upgrade again they wont downgrade it. So they allow you to downgrade only once.