I had to amend my tax return. so when I mail in my amended return what documents do I need send in besides the form 1040x? thank you in advance.

[SherekaB]

You must include any documents that you changed in your return. For example if you updated W-2 information you would include this.

Line 18 of the amended return should show the refund you are getting from your original return. Line 21 should show the refund you are getting from the amended return.

How to track your amended return: Allow 3 weeks from the mailing date.

https://www.irs.gov/filing/individuals/amended-returns-form-1040-x/wheres-my-amended-return-1

[JaeSala01]

So the only form I mail back in is the 1040x?

[SherekaB]

Your 1040x and any document that changed.

[mgl53]

i had to amend due to a late 1099 div that i had forgotten about, do i include that when i mail to 1040X

[AnnetteB6]

You would only include the actual Form 1099-DIV if there were Federal income taxes withheld. 

You should include an updated Schedule B if it is part of your return.  Otherwise, TurboTax should print all the forms that you need to send when you choose 'print the forms required for filing'.  

@mgl53