I had to add 20k to my return because I was careless and didn't get my husband's 1099-r. I did the form through Turbotax with my original return and the column B amount is about 7k more than the amount I added. What would make this happen?
Adding more income would make more of any Social Security you get taxable.
@Trooper2 you can check the social security issue by reviewing the original return
Divide Box 5b by 5a. if this is less than 85%, then adding the $20,000 to your income will add more to box 5b, so the result gets closer to or acheives 85%. I would expect that explains the entire $7,000.
If Box 5b divided by 5a is already 85% before adding in the $20,000 then the problem is elsewhere.
I assume you mean the column B amount on line 1. Compare the revised Form 1040 to the original 1040, lines 1 through 8a, to see which individual income items changed.
We are already at the maximum, but would that make the number in column B different, since it is referred to as the amount of increase?