Hi guys.. I'm amending my 2020 tax return cuz turbotax made a big mistake on it. I know this cuz other tax software showed a bigger tax refund. I'm almost ready to mail to NY state my amended NY state tax return. I'm also attaching my federal Form 1040-X. On the amended NY state tax return, I stated the reason why I'm amending is cuz turbotax made a mistake on my tax return.
Is it necessary to send in my 2020 tax return also? Or is that unnecessary?
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