Amended return - possible error in TurboTax

[laker2733]

After filing my 2024 returns (both federal and state), and receiving my refunds, I received a 1099-R from a pension disbursement agent showing a taxable income of $657. However, on the 1040-X after adding the amount on the additional 1099-R, line 1B shows a net change in adjusted gross income of $1217. How can the AGI be almost double the amount on the new 1099-R?

Gary 

[BillM223]

Can you compare your original 1040 that you filed with your current return as amended? Where are the differences?

And did you mean line 1B? On what form?

[laker2733]

I am trying to file an amended return (form 1040-X) after receiving an additional unexpected 1099-R.

Line 5B on form 1040-X (net change of taxable income) is almost double the amount of taxable income shown in box 2A on the 1099-R that I received after filing my original tax forms.

Line 15 (Taxable Income) on my original filing of form 1040-SR has increased by almost double the amount on the additional 1099-R.

TurboTax must be miscalculating the additional income.