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For back filing 8891 to defer the tax. But the earnings taxable for California. When file the 540X to pay the tax, should I check Y or N for the question : "Did you file an amended return with the IRS on a similar basis?"
Since I defer tax by 8891, it is not similar basis, and check N, right?
"basis" in this case means "reason" not cost basis.
If you amended your 1040's for the same reason, the answer is yes.
After 20 years, I am severely cutting back on responses. Do not ask specifically for my help. There are a few others on this board that can answer most questions. All the best