I-94 expiration date on Adjustment of Status Form

[jay92]

Hello,
I am filling Adjustment of Status application (I-485).
I came to US on F-1 visa. when looked at the i-94 form online, it shows Admit until data is "UNKNOWN". Now, I'm on H1-B visa and with the H1-B approval letter, it also has I-94 attached and that one does have an expiration data.
I am confused what to mention on item 23b (Expiration data of Authorized Stay shown on i-94). Should i mention "UNKNOWN" or the new date which shown on H1-B approval letter?

Also, in form I-131 it ask about the 'class of Admission' on item 6 under part1. I was entered in US as F-1 and now i am on H-1B. What class should I mention?

Thanks in Advance!

[Enub4]

When did you look at the I-94 online? soon after arrival or just recently after years of entry?

I have seen the I-94 online tool change to Unknown after some time. I think they also put a stamp with D/S when you entered using F1.

Questions 15 to 22.d mention last arrival but for 23.a, .b and .c it doesn't say that, maybe you can put the most recent I-94 that you have (a guess not an expert).

[jay92]

I recently checked my I-94 online and it says admit until date is: "UNKNOWN" . I have a stamp on my visa as D/S when i entered the US.
I am looking at the most recent I-485 form and in that item 23b is for the I-94 expiration date.

[Enub4]

Yes, 23b asks for the expiration date, but the question does not say your I-94 at your last entry, so maybe if you have a newer I-94 you can put that (not sure). I think the UNKNOWN is an online error. I always got D/S when I entered using F1 and online it showed that soon after. Now the online system doesn't show the I-94 anymore.

[jay92]

Thank you!
Do you also think i should mention H-1B in form 131 as class of admission then?