Invoicing question

I see some students mentioning some softwares they’re using for invoicing and, when I signed up for one (namely Wave), the signup required me to sign up for bank details so I can proceed to getting paid. I then found out my business needs to be with the IRS in order for me to have such accounts. So I was wondering if other students created a business with the IRS before opening an account with invoicing software (such as Wave)?