Sorry for your loss.

You can e-file a free extension at this site: https://turbotax.intuit.com/irs-tax-extensions/

How can I help you further?

his only income was social security...i dont know what amount was withheld, if any...so i cant answer the questions properly...what should i do?

If his only income is social security, he would not be required to file a tax return and you do not need to file an extension. Hope this helps!

i thought i had to file a final time...he had a checking account with a few grand in it for pennies of interest...we jointly held a checking account...he owned no property..his ira didnt have an rmd during 2018...so if i dont file for him in 2018 am i going to be in trouble with the irs on his behalf?

From the information you provided, he is not required to file a tax return.And you will not get into trouble with the IRS for not filing.

how about state of minnesota?

Likewise.

thanks for your help and your time