One key detail was left out of the answer about filing a 1040X form if you forgot to take the Telephone Tax Rebate: You need to make sure you're using the new Form 1040X, which was updated in February ...

What do I do if I've already mailed my federal tax return and discovered I failed to transfer my deduction for mortgage interest paid from line 10 of my Schedule A worksheet to my final Schedule A ...

So you've filed your tax returns by the deadline and don't want to think about it again. Then a friend tells you about a valuable tax break you didn't know about—and you suddenly remember a few ...