You are required to update your account info as soon as there is a relevant change in your name, taxpayer identification number (e.g. SSN, EIN), contact info (address, email), or status as a US or non-US person.
How do I update my taxpayer info?
Cash App reports your income using the personal info you submitted when you created your account, including your legal name and Social Security number. If you have an Employer Identification Number (EIN) and want to report your income to your business, you can update your taxpayer info by logging in at cash.app/tax-information and completing the prompts.