Amend questions

I already efiled my taxes at the end of January. At that time I put in the information for one job I had. I suddenly received two additional W2s after filing. I completely forgot I worked at them in this year. 

My taxes have been accepted but not approved. I do have the child tax credit so I know that takes longer. 

 

My questions are-

Will I get the return I already filed ?

Can I then amend my return and add in the other W2s I received?

I will be receiving more money I already know but..

Will I get penalized?

It's this a difficult process? 

Can I use TurboTax to do this online? 

Do I have to have a CPA do this for me? 

I imagine the second return will take much longer...

When can I amend update my taxes? 

Do I have to notify anyone I messed up? 

 

And again will I receive the state and federal return I already processed

 

Thank you so much