qbteachmt
Level 15

I find the IRS to be the best resource. Are you asking what to base estimated taxes on?

From: https://www.irs.gov/publications/p505

"Making joint or separate estimated tax payments won’t affect your choice of filing a joint tax return or separate returns for 2020.

2019 separate returns and 2020 joint return.

If you plan to file a joint return with your spouse for 2020, but you filed separate returns for 2019, your 2019 tax is the total of the tax shown on your separate returns. You filed a separate return if you filed as single, head of household, or married filing separately"

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