How to update passport number

[delta]

Hello

Can someone guide me how to change passport no. on ustraveldoc website? I've got my passport reissued due to surname issue and now when I try to reschedule my visa appointment I'm unable to change my passport no. to new no. However I could do so on my ds 160 form. please guide me!

[delta]

Figured out how to update the info. had to send them e-mail.