Do I need to amend my tax return, which was accepted, if I get a corrected 1099-B where the total net gain or loss is the same as the uncorrected 1099-B?

The totals for the short, long, and undetermined are the same. For the short, Form 8949 type A and B has changed (for both proceeds and cost basis) in the corrected 1099-B, but again the total short-term overall (net gain or loss) did not change.