Proof for split of income?

Article says -

https://ttlc.intuit.com/turbotax-support/en-us/help-article/state-taxes/allo[product key removed]e-p...

Earned income allocations

What if you continue working at the same job while living in 2 different states? Some companies will send you a W-2 with the state totals listed, others will send you two separate W-2’s for each state. If not or they didn't change the withholding to the second state, then you’ll have to estimate how much income you earned as a resident of one state versus the other (THIS SCENARIO APPLIES TO ME).

 

--My Case--

In my case, the withholding wasn't changed to the second state, so the W2 shows only NJ.

I did split my income between two states NC and NC, after filing taxes, NJ didn't liked it, they sent me the letter.

 

NJ state is asking the proof for split of income, because W2 only shows NJ, not the second state NC.

They are asking for proof from employer.

 

Why employer would give the proof for the second state? That  too for the year 2020 during COVID lock down.

 

So in other words, this article by Turbo Tax is wrong and should be corrected.

 

This means, go by W2 listed state source of income state. If W2 is wrong, get it corrected or have proof, I've residency proof in NC, but seems like that isn't enough, to convince it's the income i earned in NC.

 

If my W2 says NJ withheld income, that means the income is earned from NJ source.

 

These are my thoughts, let me know if u like to refute, agree, or disagree.