How do i amend my tax return for my recently deceased husband?

[kerriP]

I am sorry for your loss.  When did he pass away?  If he passed away in 2018, there would be no need to amend your 2017 return, since he was living in 2017.  Additionally, if he passed away in 2017, you could still file a joint return as a surviving spouse. 

When you file a federal tax return for the year in which your husband died, you may claim the personal exemptions and full standard deduction of a married couple filing jointly. Whether filing joint or single returns, add the term “(deceased)” and date of passing after your husband’s name on the form. Surviving spouses claiming a refund who choose to file a separate return should also file an IRS form titled “Statement of Person Claiming Refund Due a Deceased Taxpayer." 

If you still feel that you need to amend, read  the following FAQ.

https://ttlc.intuit.com/replies/3318732