How To Add Old TCS PF Details To UAN Portal ?

Previously, I have been employed with TCS, In TCS PF is managed with the PF Trust. It is not maintained with Regional PF Office.
Now I am employed with SDG Corporation, here UAN account is created but during the process of adding \"List Your Previous Member ID\" it gives error \"Please Enter Correct Details.\"
Please suggest what can be done ?

I think the UAN applies to EPF only and not private trusts.
What you need to do is file a transfer application (Form 10, i think) and get the amount transferred to your new EPF account

Yes, UAN is not applicable for Trusts. Hence you can transfer your account to new employer by filling Form 13(Revised), getting signature of your present employer and sent to the pf authorities.

I have a question about EPF in old accounts that were in the 90's maintained by exempt trusts in pre UAN days. When withdrawing / transferring money from these trusts does the EPF money get transferred. I had two transfers done in 2002 from my old employers to current employers However the start date when I log into the UAN portal is showing current employer only although the PF balances indicate that PF had got transferred