When mailing my 1040X amended return, do I need to mail my original 1040 with it?

No, you don't have to include the original return. 

According to the IRS:

"When filing an amended or corrected return:

• Include copies of any forms and/or schedules that you're changing or didn't include with your original return. To avoid delays, file Form 1040X only after you've filed your original return. Generally, for a credit or refund, you must file Form 1040X within 3 years after the date you timely filed your original return or within 2 years after the date you paid the tax, whichever is later.
• Allow the IRS up to 16 weeks to process the amended return."

I amended my 2018 return today March 7th, 2020, because my second child (dependent) was omitted from the original tax refund application.

The issue now is that I had mistakenly mailed the 1040X with 1040, EIC. ACTC forms to the IRS.  Because when I printed it on TurboTax, it printed the 1040X with 1040, ACTC and EIC. So, I mailed them all to the IRS for refund.

What is the way forward?

Should I resend the mail by sending only 1040X alone? I can see the 1040X is just 2 pages.

Please do not resend anything. If there are any issues the Internal Revenue Service will send out a letter detailing what steps need to be taken.

for the future of amendment purpose, am I supposed to mail only the 2 pages of 1040X?

Yes. TurboTax  guides you through printing and mailing your 1040X along with any required attachments. Three weeks after mailing your amendment, you can start tracking it at Where's My Amended Return? on IRS.gov. 

How do I amend my 2019 TurboTax Online return? - Community

I am filing an amendment, and rather than guiding me through what to print, it just gives me the entire 49 page document to print. It says to "choose 'All official forms required for filing' to print out your amended returns and filing instructions," but I do not see that in the print menu. Any suggestions? I'm inclined to print and send any form that has the changed number on it.

Thanks.

You can use the link provided below to reach out to someone directly to get assistance from someone to walk you through the printing section:

Turbotax Customer Support

Did you get a answer to this? Would like to know if I just mail in 1040x Two pages. Or do I mail all the pages that turbotax made me print out. Thank you

No. You will only need to mail your amended return and any forms or schedules that were updated. Please make sure your original return has been processed fully before you amend it. 

How do I amend my 2019 TurboTax Online return? - Community

What do you mean by processed fully? I scheduled my payment for April 10, and I wonder if I should wait to send the amendment until after that date.

Thanks!

I meant you can't amend an e-filed return that's in pending or rejected status. But if your refund has been accepted, it is then ok to file the amended return. Please review the following article for more information. 

You can't amend a return that hasn't been filed yet.

I am confused about how to assemble an amended 2018 return. When I go to print my amended return, i get

1 - instructions page

2 - 1040-X

3- 1040 (with corrected numbers, NOT the original return)

4 - relevant schedules.

Do I include the Form 1040 with the corrected numbers to Form 1040-X?

No.

You do not need to include the Form 1040 with the corrected numbers unless you are instructed to do so after filing your amended return.

Please see the following excerpt from the instructions on what you may need to include with your 1040-X.

I am amending my 2020 tax returns because I forgot to include a 1099-G for family leave benefits.  Do I include the 1099-G form with my 1040x or do I just mail in the 1040x?

You only need to include the 1099-G if it shows any tax withholding. 

@Msamusic

Thank you!  So Then if that is the only change, do I only need to mail the 1040X?

The only items they ask for are supporting copies of source documents that reflect a change on the tax return that you originally filed and resulted in the 1040X. 

Question I had filed my state and federal return way to early. I had gotten a 1099-g form and I was wondering where do I put the income of that on a 1040X? Or how do I amend that form? 

So if I have a income from unemployment compensation and I had federal and state withheld from my checks for my taxes where would I put those totals on a 1040X amend form if I didn’t put them on my federal and state tax? 

After you click on the link to amend your tax return, Federal and state taxes withheld from unemployment payments may be entered in box 4 (Federal) or box 11 (State) of the screen Now fill in the rest of your 1099-G details.

This is the same screen where unemployment compensation from box 1 is entered.

In TurboTax Online, access unemployment by the following:

• Down the left side of the screen, click on Federal.
• Across the top of the screen, click on Wages & Income.
• Under Your income, scroll down to Unemployment and paid family leave (1099-G).
• Click on Review or Edit/Add to the right.
• Follow the screens to Now fill in the rest of your 1099-G.

See also this TurboTax Help.

So where do I put it on a 1040x form?

@Drew35

The links below will show you how to amend and how to add your 1099G.

How to amend (change or correct) a return you already filed

Where do I report a 1099-G for unemployment or paid family leave?

Still unclear....  Yes, that's what the IRS says BUT the original 1040 is one of the forms that is changed.  So it still isn't clear whether or not to include 1040 with 1040X.

How do I find the 1040 x in he Turbotax software?