Amending a tax return I did not prepare

Yes you can.

First recreate the original return in Lacerte. You may be able to shortcut some things, such as if Schedule B won't change, just enter total int & divs and not all 6 sources.

Then prepare the amended return.

There may be a question as to whether it can be efiled, though.

Hi SJRCPA and Phoebe

First of all, thank you for your responses and insight.  I really appreciate you!  Ok, I"m trying to not overthink this, but....

Phoebe, (love that name!)

The original return was efiled by H&R Block.  I don't think H&R Block uses Lacerte but if they did, I know that no amendment was filed to the original return.  To your point, I am planning on efiling the amended return. Thank you for pointing that out.

SJRCPA,

I understand about recreating the original return in Lacerte.  Dumb question:  If I recreate the original return, won't I have to efile it in order to amend it?  And should I file that recreated return if it has already been filed/efiled?  Or do I NOT efile the recreated return, Amend the recreated return only and just efile the amendment?  I thought you could only use the "E-File Amendement Wizard" after you've run the E-file Wizard on a return.  

Hope that question makes sense.

Please let me know your thoughts and again thank you so much for your help.

PPECPA