hi,
I have a few question about filing an amendment, and I'd appreciate if someone is willing to answer my questions.
1. I understand 1040X is the amendment form, but 1040X gets updated from time to time. For example, the latest1040X is slightly different from the 2017 version. When amending with old TT, it seems the TT uses the old version from the year that the TT software is associated to.
Am I supposed to use the latest version when amending an old return or is it OK to use the old version from the year the amendment is applied to ?
2. what should be included in the amended return ? The instruction says I should mail the amended return with supporting documents. Is 1099B considered a supporting document if I'm amending 1099B incomes ?
3. Do I need to sign on the forms other than 1040X ? For example, 1040 mailed with 1040X ?
Any helps are appreciated.
