After you file

It was TurboTax live help the manager who filed my AMMENDED return hours after the first one was accepted! Matter fact spoke to four different TurboTax CPA’s who all said once the first return showed accepted to go ahead a do the amendment! I can’t tell y’all how I regret not paying the full tax on the cares money I took off my 401k on last years tax return! This has been a nightmare!  

So what do I do? Do I respond to the letter asking me to pay the original filing amount? Do I pay it? Or just wait until they get around to my AMMENDED return? 
Thanks for your help!