If WhatsApp based invoice submission is enable by your Finance Admin, you will receive registration confirmation from Pazy whatsapp number.
Start with saying "Hi" to Pazy WhatsApp Bot
Over conversation, bot will ask you required submission fields
Once an. invoice is submitted, you will get the final Submission confirmation message.
You can only make changes from pazy dashboard https://app.pazy.io/
At any point you want to cancel invoice submission process, just send /stop to bot.