No action from WT/Asobo in this still? Been near 12 months on what should be an easy fix.
Have raised it on WT’s discord channel for SR22T support and got discarded as they carnt do or push for a fix, has to comE from MS.
Don’t see a fix in SU4 Beta yet. Some planes have gotten unannounced updates (747-8) but I didn’t find any option for the TKS for the SR22T in today’s flight.
Do you have the same issue if you follow the OP’s steps to reproduce it?
• Yes
Provide extra information to complete the original description of the issue:
•
If relevant, provide additional screenshots/video:
•
still nothing 
I see a fix posted in SU4 notes for this, but I am away, can someone please test and confirm ???
For reference:
Yes, you can fill it. However, it is not being sensed on the Garmin anti ice page, so how would we know it is working. Anti-Ice shows empty with the TKS pumps switch in the on or off position.
In the EFB there is a Payload and Fuel section. No Cargo Section that I see in MSFS 2024 1.6.32.0. TKS fluid is not there. Garmin continues to show empty. De-icing does not work and I crash in icing conditions.
Finally found TKS fill in the EFB/Aircraft/Flight Performances/Mass and Balance/click on the number between the doors on the picture of the aircraft. Obscure, but ok. To me, the button binding for Fuel and Repair ought to fill TKS as well.
Agree, should not be dependent of the cargo weight, so it should be fixed.
Workaround works:
workaround tag added and solution marked on the post with the workaround is.
Update: FIxed in SU6, awesome!
I guess it could be this fix: