Since you have already filed your return you will have to wait until the IRS(Internal Revenue Service) either accepts or rejects your return. If the IRS has accepted your return you will have to amend your return and correct any errors. If the IRS has rejected your return you will need to fix the errors like correcting your address and resubmit your tax return. You can try and contact them if you get Accepted to see what they say also but it is too late to do anything once you have filed.
Amend: Available February 2016
https://ttlc.intuit.com/questions/1894381-how-to-amend-change-or-correct-a-return-you-already-filed
That depends. If you received direct deposit of your refund, you should receive your stimulus payment via direct deposit. If you had a balance due, the IRS will issue a check to the address on your return. If it is not deliverable to that address, the check will be returned to the IRS. You may have to wait until you file your 2020 tax return to claim the payment as a credit.
The IRS has created a Get My Payment portal to track the progress of these payments for taxpayers and to allow taxpayers to update banking information.