<prompt> Human: I need help in what language or keywords to include in the explanation of changes portion of the 1040X. Should I mention the line number that changed on the 1040 in that explanation. I contributed money to a health savings account which is tax-deductible. Just trying to get an idea how to write that in a way that the IRS understands without causing any red flags. Thanks for the help!  <response>: Forgot to include contributions to Health Savings Account on original return. See attached 8889.Write what you would say if an IRS auditor asked you in person : Nothing to stress over. 