I need to amend my 2020 taxes and include a 1041 for myself and my minor child. Will purchasing the Tax Business let me do this and will it pull my original tax filing?

"include a 1041 for myself and my minor child."

May I assume that you want to include a K-1 (1041) in your 1040 return?

"Will purchasing the Tax Business let me do this "

TurboTax Business will create an estate or trust return (form 1041). It will also generate the K-1 (1041) that gets enters into your 1040 return.

"will it pull my original tax filing" 

I don't know what this is referring to.

If you have a trust or estate return to do, then the order of action is:

1. Using TurboTax Business, create the 1041 return for the estate or trust.

2. Create a PDF copy of the 1041 return. Save it someplace you can find it (or print a copy). Note that the 1041 is filed separately from your 1040.

3. Open your 1040 return.

4. In addition to entering all your other stuff, enter your K-1 (1041) into the 1040 return (this is why you need the copy of the 1041, because the K-1 is produced as part of it).

5. Finish your 1040 return.

Is your minor child also filing a return?