Where I have to declare my Sales in Tamilnadu Sales tax eCtax New Portal

Nature of transaction Annexures /       Base Form
Sales Transactions :-  
Local sales to un-registered dealer (Net figure i.e Sales-Return) Base Form
Local sales to registered dealer for first schedule goods 15
Local sales Return to registered dealer for first schedule goods 19
Local sales made by Local agents to be declared by Principal 17
Local Sales made by local agent on behalf of Local Principal to be declared by local agents 16
Work contract Receipt sec 5 Base Form
Registered subcontractor turnover Base Form
Labour and like charges (Rule 8(5)d) Base Form
Zero Rated Goods – Sales to SEZ  and schedule 5 notified organizations within the State of TN 20
Exempted local sales (Schedule IV/notification) 21
Registered/Un-registered sales for second schedule goods 18
Interstate sales for First & Second Schedule goods 22
Interstate sales Return for First & Second Schedule goods 23
Transit sale u/s 6(2) CST Act 28
Interstate sales exempted goods Base Form
Interstate sale of  goods u/s 4 Base Form
Interstate branch/consignment transfer 24
Export to other Countries u/s 5(1)-Direct Export 26
Sales in the course of Import  u/s 5(2)-High Sea sales/Inbond sales 25
Sales of Goods occasioning Export u/s 5(3)- Form-H Sales 27
Sales to other State SEZ against Declaration Form I Base Form
Sales to International Organizations in other States against  Declaration Form J Base Form
Output Tax due and eligible for Refund as per incentive scheme (MOU) – Schedule 1 goods Base Form
Input Tax Credit Refund claimed as per Government Order on Inputs – MOU Base Form
Input Tax Credit Refund claimed as per Government Order on Capitals Goods – MOU Base Form
Tax deferred (Schedule 1 & Interstate) Base Form
Adjustment of Input Tax Credit against Central Sales Tax liability Base Form
Cash discount allowed according to the prcatice normally CST Base Form
Tax collection deducted according to Section 8-A(1)(a) CST Base Form