Yes it will affect your payment since dependents cannot get the payment. Wait until your efiled return is processed. Regardless of when you mail your amended return, it will take several months for the amended return to be processed and you get your stimulus payment. 

My E-file has been processed and accepted by fed and state. I received my state refund not fed yet. So im guessing i receive the fed one soon since i filed it on the 25th of last month. So i wait to receive the refund first then mail out? or can i just mail it out whenever. Thank you for your time.