Someone filed out their US 1040 using H&R Block Tax Software. They have under $2K tax due: less than employer withholding, so they have a refund coming.
They live in a state with sales tax but no income tax. There's a line to enter local sales tax rate (in addition to state sales tax rate) but they mistakenly entered the total sales tax rate. They e-filed. Then they noticed the mistake, and changed it, but it didn't change the refund amount. The software is also not suggesting it be refiled or a corrected 1040X be filed.
I would think that the sales tax rate would have some effect. It was a difference of about 6% in the sales tax rate. Seems like the refund amount would've changed by at least $1.
1) Why would this not change the calculated amount of the refund? Is there some threshold beneath which sales tax rate doesn't affect anything?
2) Is there no reason to file a 1040X?