The question was never answered.  The question asked was "Is there a way to enter my address as in care of on her 1040 form?"  (Where & how?)

I too have this question under the same scenario.  Obviously form 1310 has space for name & address of the person filing form 1310.  But form 1040 does not have any place for a 2nd name to go, and no instructions in the software as to whether the non-court-appointed filing representative can/should replace JUST the decedent's address with theirs, or also include the filer's name.  If including name, where exactly does it go and does it need to be "in care of", and if so, again, where?

Form 1310 will take this information.

You might ask IRS, good luck finding a person who knows that area.

There is no second line for address, this is part of the problem.  What kind of 1040 are you looking at ??

"so where does the personal rep/filer's name go on the 1040 in the download Deluxe version"

Your name goes on the signature line of 1040,

and your name and address goes on Form 1310 if you are not court-appointed.

You'll have to file a paper return.

You don't need Form 1310 to claim the refund if you attach a copy of the court certificate to the tax return

showing you were appointed the personal representative.

For that you'd also have to file a paper return.

You don't need form 1310 if there is a surviving spouse filing a joint return and you let the spouse sign and file.

Because SSN often gets blocked, the spouse may also have to file a paper return.

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If there is no refund, you do not need Form 1310.

All valid information with one major exception, but still confusing.

The only place for name and address is Form 1310.

Clearly, the decedent's name goes on Form 1040.

I'm thinking no answer is going to satisfy you.

Thanks