What does a penalty from last year mean. My ex did the joint taxes in 2024 and I did not sign

[VolvoGirl]

Where do you see that?  Did you get a penalty on 1040 line 38?  I don't think it says "last year" anywhere for a penalty.  

[Mike9241]

e-filed returns don't require a signature, just the prior year's AGI (for 2024 that would be 2023's)

even though no signature is required on an e-file, you are supposed to consent to a joint return filing. 

if it paper filed, then he may have broken the law becuase bith signatures are required on a joint return.

we are not exactly sure what you mean or where you see "penalty from last year"