Tds by govt dep on supply

Res All,

We have supplied many consignment to different stores of Govt Department  in Dec 2018. Out of all , One store deducted TDS but not reflecting/given credit to us through Portal. 2nd Store Incharge Deducted TDS and also reflecting Credit on Dec Portal and also accepted by us. (Option to accept and reject given). Balance stores have not send our payment so that I think they will deduct TDS as and when payment made.

My Request/question is :-

1. Should I file TDS return of DEC 18 on GST portal or I have to wait for another store who have not given credit.

2. Can I file Dec month TDS return late also or it must be complete in January 19.

Thanks in advance 

Suresh