I did it yesterday on coveredCA:
Sign in to your account, and you are directed to your home page.
Near the top is a big yellow button: "Report a Change" - click it!
Thanks, that's pretty much what I did. In my case, the income was about the same.
It should have worked like this: Click here and enter the amount from line 37 of your 2013 income tax form.
Instead I had to do a bunch of figuring. For the benefit of others, this is what I did (and I don't know if this is the best way):
I clicked on Report a change.
I chose to edit the income information.
I entered one line for cap gains, dividends, etc. I took the info from the tax return and divided it by 12, and put a date of 1/1/2014 for the entry. (If I chose One Lump Sum, there is a warning that this may be a problem.)
I entered another line for Roth distribution, use the amount on line 15b of the tax return, and divide it by 12, and enter it with a date of 1/1/2014.
I go back and choose deductions, take the HSA deduction of 4250 from line 25 of the tax return, divide it by 12 and enter that with a date of 1/1/2014. Yes, I won't have that for the year 2014, but I am using last year's income as the estimate.
I go back and check that the total income comes out to what is on line 37 of my 2013 tax return.
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Some things just didn't seem right. Do you think that will work OK?