If the SSA-1099SM has your husband's Social Security number on it as the recipient, then you do not report that as part of your tax return. It would only be reported on a return filed for your husband.
If it was reported to you as income, with your Social Security number on the form, then you would include it with your other box 5 amount already reported to you.
Your question stated that your husband passed away in 2005. If that was a typo and instead he passed in 2025, then you may be eligible to file a joint return for 2025. If that is the case, then his SSA-1099SM would be reported as part of that joint return.