Visa Fees and DS 160 form filling

Can we pay the Visa fees first without completing DS-160 form.

Basically I would like to whether we can change the DS-160 application number after paying the Visa Fees??

After filling DS160 form you will receive confirmation page/number and that you will use for the visa fee payment.

I believe that once the fee is paid, you cannot change DS160 application number…

If you are in a situation to transfer visa fee for another application, talk to your bank or nearest visa office. Chances are very little.