I recently finished amending a 2004 return for a client who had originally filed their own return and did not include some broker transactions, and then I prepared their 2005 return for them. They have now brought me the 2005 return for their elderly father and after reviewing all his information, he can be claimed as a dependent on their return (his only income was social security and even that does not cover all his medical bills.)
My question is; are there any concerns about making changes to the 2004 return that I have already amended?