Why is the tax exempt interest number different on my return from what i input to the schedule?

[SteamTrain · Accepted solution]

1)  Box 8 on a 1099-DIV and box 10 on a 1099-DIV?, both add into line 8b of the 1040.

2) any box 13 value on the 1099-INT subtracts from that number

3) any post-form entry of accrued interest for a recently purchased bond can also reduce the value of line 8b of the form 1040