continued from comment above
You will note that TT does not flag these overrides as an error and will check and calculate everything else as before. And the IRS has no way of even knowing that you overstated your gross distribution on Line 4a, unless and until their computers cross check with your 1099-R's and even then I'm pretty sure they don't flag differences of a dollar. And since the taxable amount on 4b is correct, they won't care if the gross amount you reported is a dollar or two higher than what you actually received. They mostly don't like it when you report income that's lower than what you actually received.
No one is suggesting that this is as good as TT fixing this, but it is better than sending in a return with 4a thousands of dollars less than 4b. Plenty of folks have already reported horrible problems with that.
