The stimulus payment will go to the account you entered for direct deposit on the 2019 tax return. The direct deposit information cannot be changed. If the account is closed the IRS will send the payment by mail or on a debit card.
Go to this IRS website for stimulus information - https://www.irs.gov/newsroom/treasury-and-irs-begin-delivering-second-round-of-economic-impact-payme...
Go to this IRS website to check the status of your payment - https://www.irs.gov/coronavirus/get-my-payment