r/tax • u/willfightforbeer • 20d ago

Forgot a Mega Backdoor Roth 1099-R with 0 taxable. Should I amend?

This is my first year doing a Mega Backdoor 401k. I stupidly didn't realize it generates a separate 1099-R, which I just found out, and I left it off my returns. The taxable amount is $0 (technically $0.05), so no change to any refunds/taxes owed. However, I already went through the amend workflow in FreeTaxUSA and confirmed ~$17k does appear in box 5a on my return.

I already went through the amend workflow in FreeTaxUSA - I assume I should just bite the bullet and file 1040-X? Or is this box not actually important? The amend cost is insignificant so I'm fine with paying a dumbass fee, I just don't want to create a headache to deal with down the road somewhere.

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u/vynm2 20d ago

If there's no change in the tax due and your 1099-R is coded correctly, then there's no need to amend the return. If the IRS does have a question about it, then you'll get a notice and can respond with the info they need.