Maybe. You can't amend yet because your return has not been processed and the software won't be ready until later this month. They might process your return as is and issue you the refund amount you filed for (no delay in your refund), but you will get a letter to amend later; they may adjust your tax return (refund will probably be delayed), or they may send you a letter requesting you file the amendment before they process your return (your refund will be delayed).
Yes, you will need to amend your return, but you should not do so until you have received any refund you were expecting or you payment has been processed.
Please visit How to Amend Taxes that Are Already Filed for more information.
Maybe. You can't amend yet because your return has not been processed and the software won't be ready until later this month. They might process your return as is and issue you the refund amount you filed for (no delay in your refund), but you will get a letter to amend later; they may adjust your tax return (refund will probably be delayed), or they may send you a letter requesting you file the amendment before they process your return (your refund will be delayed).