I did not add my employment that started December 17th of 2022, how do I fix this on my previous return?

I thought I started the year at the beginning of 2023 but I stated December 13th

posted

If you want to make changes or add a document to a tax return that has already been submitted, you should follow these guidelines.

You must first wait until the initial return is completely processed.
You will have to use the same TurboTax account that you used for the original tax return.
Once you begin your amendment, you'll see your original return. 
The refund calculator will start new at $0 and only reflect the changes in the refund or tax due
Only make changes to the areas of your return that need amending.
You have three years from the date you filed your return or two years after you paid the tax due (whichever is later) to file an amendment

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